List of islands of California

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This list of islands of California is organized into sections, generally arranged from north to south. The islands within each section are listed in alphabetical order.

The Geographic Names Information System (GNIS) lists 527 named islands in the state.[1]

Humboldt Bay[edit]

All three islands in Humboldt Bay are located in the narrow midsection of the bay. This portion of the bay is located within the City of Eureka, California entirely within Humboldt County.

Daby IslandThe smallest of the three islands, this island has a maximum elevation of 3 feet and is located just northeast of Woodley Island.
Indian Island40°48′46″N 124°10′06″W / 40.8129°N 124.1684°W / 40.8129; -124.1684 (Indian Island)The largest island, 1.3 miles (2.1 km) long, was originally the center of culture and population of the indigenous Wiyot people. Now protected, no public access is allowed, except for the Wiyot and grandfathered residents.
Woodley IslandThe second largest of three islands. Woodley Island Marina (Eureka's largest marina), the Eureka regional office of the National Weather Service, and offices of the Humboldt Bay Harbor Recreation & Conservation District are located on the island.

San Francisco Bay Area[edit]

For the Farallon Islands, see List of islands of California#Farallon Islands.
For islands in the Sacramento River Delta, see List of islands of California#Sacramento-San Joaquin River Delta.
For islands in Suisun Bay, see List of islands of California#Suisun Bay.

Other islands of the San Francisco Bay Area:

Alameda Island37°45′55″N 122°14′30″W / 37.76528°N 122.24167°W / 37.76528; -122.24167 (Alameda Island)Alameda, San Francisco (small, uninhabited sliver)This 6-mile (9.7 km) long island in San Francisco Bay is the main part of the City of Alameda.
Alcatraz IslandAlcatraz Island 1, SF, CA, jjron 25.03.2012.jpg37°49′36″N 122°25′24″W / 37.8266°N 122.4233°W / 37.8266; -122.4233 (Alcatraz Island)San FranciscoThis 22-acre (8.9 ha) island in San Francisco Bay once served as a lighthouse, a military fortification, a military prison, and as a federal prison until 1963. It is now part of the Golden Gate National Recreation Area.
Angel IslandAngel island features.jpg37°51′46″N 122°25′51″W / 37.862778°N 122.430833°W / 37.862778; -122.430833 (Angel Island)MarinWith an area of 1.2 square miles (3.1 km2), this island in San Francisco Bay processed approximately 1 million immigrants to the U.S. during 1910 to 1940. It is currently a state park.
Año Nuevo IslandAno Nuevo Island.jpg37°06′31″N 122°20′16″W / 37.1086°N 122.3378°W / 37.1086; -122.3378 (Año Nuevo Island)[2]San MateoSmall Pacific island, about 0.2 miles (0.32 km) long, near Año Nuevo (New Year's) Point, south of the Golden Gate. It is protected by the Año Nuevo State Reserve as an important habitat for seabirds and other coastal wildlife.
Bair Island37°31′48″N 122°13′20″W / 37.5299°N 122.2222°W / 37.5299; -122.2222 (Bair Island)San MateoThis 2,600-acre (1,100 ha) island in San Francisco Bay near Redwood City is part of the Don Edwards San Francisco Bay National Wildlife Refuge.
Bay Farm IslandAerial view of Bay Farm Island and San Leandro Channel.jpg37°44′17″N 122°15′07″W / 37.738°N 122.252°W / 37.738; -122.252 (Bay Farm Island)AlamedaThis former island in San Francisco Bay has been connected to the mainland. It is part of the City of Alameda.
Belvedere Island37°52′18″N 122°28′07″W / 37.8716°N 122.4685°W / 37.8716; -122.4685 (Belvedere Island)MarinThis former island in Richardson Bay has been connected to the mainland. It is part of the City of Belvedere.
Bird Island37°49′27″N 122°32′12″W / 37.8241°N 122.5366°W / 37.8241; -122.5366 (Bird Island)[3]MarinSmall Pacific island between Point Bonita and Rodeo Cove.
Bird RockBirdRock3339.jpg38°13′48″N 122°59′40″W / 38.2299°N 122.9944°W / 38.2299; -122.9944 (Bird Rock)[4]MarinSmall Pacific island west of Tomales Point, primarily a seabird colony. It covers 2 acres (0.81 ha).
Brooks Island37°53′47″N 122°21′19″W / 37.89639°N 122.35528°W / 37.89639; -122.35528 (Brooks Island)Contra CostaA 65-acre (26 ha) island in San Francisco Bay south of Richmond, protected as part of the Brooks Island Regional Shoreline.
The BrothersBrothers-islands.jpg37°57′48″N 122°25′59″W / 37.96333°N 122.43306°W / 37.96333; -122.43306 (Brother Islands)Contra CostaTwo small islands, East Brother and West Brother, located west of Point San Pablo. Each is about 300 feet (91 m) long. East Brother has a lighthouse and a bed and breakfast.
Castro Rocks37°55′56″N 122°25′07″W / 37.93222°N 122.41861°W / 37.93222; -122.41861 (Castro Rocks)Contra CostaBeneath the Richmond – San Rafael Bridge.
Coast Guard IslandCoast Guard Island May 2009.jpg37°46′56″N 122°15′00″W / 37.78222°N 122.25000°W / 37.78222; -122.25000 (Coast Guard Island)AlamedaLocated in the Oakland Estuary, this 67-acre (27 ha) artificial island is part of the City of Alameda. It is home to various United States Coast Guard facilities.
Corinthian Island37°52′22″N 122°27′32″W / 37.87278°N 122.45889°W / 37.87278; -122.45889 (Corinthian Island)MarinThis former island was joined to the mainland in the 1980s. It is split between the city of Belvedere and the town of Tiburon.
East Marin Island37°57′52″N 122°28′06″W / 37.96444°N 122.46833°W / 37.96444; -122.46833 (East Marin Island)MarinNear San Rafael, California.
Gull Rock37°52′34″N 122°36′59″W / 37.8760°N 122.6164°W / 37.8760; -122.6164 (Gull Rock)MarinA Pacific island near Mount Tamalpais, about 200 feet (61 m) long.
Hog Island (Petaluma River)38°09′33″N 122°32′18″W / 38.1591°N 122.5383°W / 38.1591; -122.5383 (Hog Island (Petaluma))SonomaIsland in the Petaluma River wetlands.
Hog Island (Tomales Bay)Hog Island, Tomales Bay, Marin County, California.jpg38°11′50″N 122°56′09″W / 38.1971°N 122.9358°W / 38.1971; -122.9358 (Hog Island (Tomales))MarinA 2-acre (0.81 ha) island in Tomales Bay.
Kent IslandKent Island 3420.jpg37°54′44″N 122°40′43″W / 37.9121°N 122.6786°W / 37.9121; -122.6786 (Kent Island)MarinAn island in Bolinas Lagoon, near the town of Bolinas. About 0.5 miles (0.80 km) long.
Mare IslandWfm mare island aerial.jpg38°05′44″N 122°16′21″W / 38.0955°N 122.2725°W / 38.0955; -122.2725 (Mare Island)SolanoAn island in San Pablo Bay near Vallejo. About 3.5 miles (5.6 km) long, site of a major shipyard.
Mussel RockMussel Rock.jpg37°40′01″N 122°29′50″W / 37.6669°N 122.4972°W / 37.6669; -122.4972 (Mussel Rock)San MateoA stack in the Pacific Ocean near Daly City. About 200 feet (61 m) long.
Rat RockRat Rock 3655.jpg38°00′16″N 122°27′43″W / 38.00444°N 122.46194°W / 38.00444; -122.46194 (Rat Rock)MarinAn 18-foot (5.5 m) tall rock north of China Camp.
Red Rock IslandRed-rock-island.jpg37°55′45″N 122°25′51″W / 37.92917°N 122.43083°W / 37.92917; -122.43083 (Red Rock Island)Contra Costa, Marin and San FranciscoThis uninhabited 5.8-acre (2.3 ha) island is located in San Francisco Bay just south of the Richmond – San Rafael Bridge, near the meeting point of three counties. It is privately owned.
San Pedro Rock37°35′43″N 122°31′27″W / 37.5952°N 122.5241°W / 37.5952; -122.5241 (San Pedro Rock)San MateoA Pacific island near the city of Pacifica. About 800 feet (240 m) long.
Seal Rocks (San Francisco, California)6193010163 small.jpg37°46′43″N 122°30′58″W / 37.77861°N 122.51611°W / 37.77861; -122.51611 (Seal Rock)San FranciscoA series of large rocks in the Pacific Ocean that host a sea lion colony.
Seal Rock (San Mateo County, California)37°23′30″N 122°25′29″W / 37.3916°N 122.4247°W / 37.3916; -122.4247 (Seal Rock)San MateoA Pacific island south of Half Moon Bay, about 500 feet (150 m) long.
Sears Rock37°49′43″N 122°32′57″W / 37.8285°N 122.5491°W / 37.8285; -122.5491 (Sears Rock)MarinA rock in the Centissima Reef.
The SistersThe Sisters 3647.jpg37°59′18″N 122°26′28″W / 37.9883°N 122.4411°W / 37.9883; -122.4411 (The Sisters)MarinA pair of small islands in San Pablo Bay, 2,000 feet (610 m) south of Point Saint Pedro.
Treasure IslandWfm yerba buena treasure islands usgs.jpg37°49′29″N 122°22′16″W / 37.82472°N 122.37111°W / 37.82472; -122.37111 (Treasure Island)San FranciscoThis 403-acre (163 ha) artificial island in San Francisco Bay is tied to Yerba Buena Island. It was dredged out of the bay to house the Golden Gate International Exposition of 1939-40.
West Marin Island37°57′57″N 122°28′22″W / 37.96583°N 122.47278°W / 37.96583; -122.47278 (West Marin Island)MarinNear San Rafael, California.
Yerba Buena IslandYerba Buena Island 4017.jpg37°48′36″N 122°21′58″W / 37.81000°N 122.36611°W / 37.81000; -122.36611 (Yerba Buena Island)San FranciscoThis island in San Francisco Bay is home to a Coast Guard station. The San Francisco – Oakland Bay Bridge passes through it by means of a tunnel.

Farallon Islands[edit]

The Farallon Islands are a group of rugged small islands over 20 miles (32 km) offshore from the mainland of the City and County of San Francisco, which they are also formally within. They consist of over twenty small islets divided into north, south and middle sections, as well as a major bank, Fanny Shoal. The surrounding waters were once used as a disposal site for radioactive waste.[5]

Aulone Island and Great Arch RockAulon arch Sugarloaf.JPG37°42′08″N 123°00′15″W / 37.7023°N 123.0042°W / 37.7023; -123.0042 (Aulon Island)North of Southeast Farallon Island, measuring 200 feet (61 m) wide and 400 feet (120 m) long.
Drunk Uncle IsletsGroup of small islets north of Maintop Island.
Farallón Viscaíno
Middle Farallon Island37°43′38″N 123°01′56″W / 37.7272°N 123.0322°W / 37.7272; -123.0322 (Middle Farallon)Medium-sized islet 1.8 miles (2.9 km) northwest of Southeast Farallon Island. It is 210 feet (64 m) long and has an area of 0.8 acres (0.32 ha).
North Farallon Island37°45′44″N 123°05′53″W / 37.7622°N 123.0981°W / 37.7622; -123.0981 (North Farallon)Medium-sized islet 500 feet (150 m) long and 100 feet (30 m) high, covering 2 acres (0.81 ha).
Peñasco Quebrado
Piedra Guadalupe
Island of St. James37°46′00″N 123°06′05″W / 37.7666°N 123.1014°W / 37.7666; -123.1014 (Island of Saint James)Medium-sized islet 3 acres (1.2 ha) in size, measuring 410 feet (120 m) long and 154 feet (47 m) high.
Sea Lion Rock37°42′10″N 123°00′19″W / 37.7029°N 123.0054°W / 37.7029; -123.0054 (Sea Lion Rock)Small islet northwest of Aulon Island, about 130 feet (40 m) long.
Seal Rock37°41′38″N 123°00′12″W / 37.6938°N 123.0033°W / 37.6938; -123.0033 (Seal Rock)Small islet south of Southeast Farallon Island, with a maximum height of 82 feet (25 m).
Maintop IslandSE Farallon Island.jpg37°41′57″N 123°00′40″W / 37.6991°N 123.0111°W / 37.6991; -123.0111 (Maintop Island)West of Southeast Farallon Island, and has a maximum height of 223 feet (68 m).
Southeast Farallon IslandView from Mirounga Bay.jpg37°41′50″N 123°00′11″W / 37.6972°N 123.0031°W / 37.6972; -123.0031 (Southeast Farallon)Is the largest of the Farallons, covering 0.19 square miles (0.49 km2). It is the only inhabited Farallon Island, and is also the site of Farallon Island Light.
Sugarloaf Island37°42′13″N 123°00′12″W / 37.7035°N 123.0032°W / 37.7035; -123.0032 (Sugarloaf Island)Directly to the northeast of Aulone and Great Arch Rock, about 80 feet (24 m) high.

Suisun Bay[edit]

Suisun Bay is an arm of the San Francisco Bay estuary which connects the Sacramento and San Joaquin rivers to the Carquinez Strait.

Chipps Island38°03′19″N 121°54′43″W / 38.0552°N 121.9119°W / 38.0552; -121.9119 (Chipps Island)Solano
Dutton Island38°04′54″N 121°58′14″W / 38.0816°N 121.9705°W / 38.0816; -121.9705 (Dutton Island)Solano
Freeman Island38°04′46″N 121°59′09″W / 38.0794°N 121.9858°W / 38.0794; -121.9858 (Freeman Island)Solano
Grizzly Island38°09′05″N 121°58′22″W / 38.1513°N 121.9727°W / 38.1513; -121.9727 (Grizzly Island)Solano
Hammond Island38°06′18″N 121°56′15″W / 38.1049°N 121.9375°W / 38.1049; -121.9375 (Hammond Island)Solano
Joice Island38°09′00″N 122°03′34″W / 38.1499°N 122.0594°W / 38.1499; -122.0594 (Joice Island)SolanoA marshy island 6 miles (9.7 km) long, north of Grizzly Bay.
Morrow Island38°07′00″N 122°05′11″W / 38.1166°N 122.0864°W / 38.1166; -122.0864 (Morrow Island)Solano
Roe Island38°04′21″N 122°02′05″W / 38.0724°N 122.0347°W / 38.0724; -122.0347 (Roe Island)SolanoIn Suisun Bay.
Ryer Island38°04′58″N 122°00′52″W / 38.0827°N 122.0144°W / 38.0827; -122.0144 (Ryer Island)Solano475-hectare (1,170-acre) island, between Suisun Bay and Suisun Cutoff.[6] About 2 miles (3.2 km) long.
Seal Islands38°03′20″N 122°02′50″W / 38.0555°N 122.0472°W / 38.0555; -122.0472 (Seal Islands)Contra CostaIn Suisun Bay.
Simmons Island38°05′49″N 121°59′26″W / 38.0969°N 121.9905°W / 38.0969; -121.9905 (Simmons Island)Solano
Snag Island38°04′22″N 121°58′32″W / 38.0727°N 121.9755°W / 38.0727; -121.9755 (Snag Island)Solano
Van Sickle Island38°04′00″N 121°54′04″W / 38.0666°N 121.9011°W / 38.0666; -121.9011 (Van Sickle Island)SolanoAn island 2.5 miles (4.0 km) long at the junction of the Sacramento River, San Joaquin River, and Suisun Bay.
Wheeler Island38°05′06″N 121°56′15″W / 38.0849°N 121.9375°W / 38.0849; -121.9375 (Wheeler Island)Solano

Sacramento-San Joaquin River Delta[edit]

The Sacramento-San Joaquin River Delta is an inverted delta at the juncture of the Sacramento and San Joaquin rivers.

Andrus Island38°09′28″N 121°35′54″W / 38.1577°N 121.5983°W / 38.1577; -121.5983 (Andrus Island)Sacramento3,000-hectare (7,400-acre) island, bounded by Sacramento River, Georgiana Slough, Mokelumne River, San Joaquin River, Jackson Slough, and Seven Mile Slough.
Bacon Island37°58′36″N 121°33′08″W / 37.9766°N 121.5522°W / 37.9766; -121.5522 (Bacon Island)San Joaquin2,200-hectare (5,400-acre) island, bounded by Connection Slough, Old River, Woodward Island, and Middle River
Bethel Island38°01′53″N 121°38′27″W / 38.0313°N 121.6408°W / 38.0313; -121.6408 (Bethel Island)Contra Costa1,450-hectare (3,600-acre) island, bounded by Taylor Slough, Piper Slough, Sand Mound Slough, and Dutch Slough
Bouldin Island38°06′15″N 121°32′05″W / 38.1041°N 121.5347°W / 38.1041; -121.5347 (Bouldin Island)San Joaquin2,400-hectare (5,900-acre) island bounded by South Mokelumne River, Little Potato Slough, Potato Slough, and Mokelumne River.
Bradford Island38°04′38″N 121°39′48″W / 38.0771°N 121.6633°W / 38.0771; -121.6633 (Bradford Island)Contra Costa885-hectare (2,190-acre) island in the lower delta bounded by the San Joaquin River, False River and the Bradford Island canal/slough. Accessible only by Ferry via Jersey Island, just south of it.
Browns Island37°57′37″N 121°21′21″W / 37.9602°N 121.3558°W / 37.9602; -121.3558 (Browns Island)Contra Costa275-hectare (680-acre) island, bounded by Middle Slough, New York Slough, and Suisun Bay
Jersey Island38°02′11″N 121°41′09″W / 38.0363°N 121.6858°W / 38.0363; -121.6858 (Jersey Island)Contra Costa1,425-hectare (3,520-acre) island, bounded by False River, Piper Slough, Taylor Slough, Dutch Slough and San Joaquin River.
Jones Tractupper: 37°55′12″N 121°28′35″W / 37.9199°N 121.4763°W / 37.9199; -121.4763 (Upper Jones Tract)
lower:37°57′16″N 121°29′38″W / 37.9544°N 121.4938°W / 37.9544; -121.4938 (Lower Jones Tract) (lower)
San Joaquin4,900-hectare (12,000-acre) island (tracts, Upper- and Lower-), bounded by Empire Cut, Whiskey Slough, Trapper Slough, and Middle River, 10 km east of Stockton
King Island38°03′56″N 121°26′12″W / 38.0655°N 121.4366°W / 38.0655; -121.4366 (King Island)San Joaquin1,300-hectare (3,200-acre) island bounded by White Slough, Bishop Cut, Disappointment Slough, and Honker Cut
Kings Island37°51′29″N 121°34′08″W / 37.8580°N 121.5688°W / 37.8580; -121.5688 (Kings Island)Contra Costa3.5-hectare (8.6-acre) island in Old River
McDonald Island38°00′05″N 121°29′24″W / 38.0013°N 121.4900°W / 38.0013; -121.4900 (McDonald Island)San Joaquin2,400-hectare (5,900-acre) island, bounded by San Joaquin River, Middle River, Latham Slough, and Empire Cut.
Merritt Island38°21′19″N 121°33′01″W / 38.3554°N 121.5503°W / 38.3554; -121.5503 (Merritt Island)YoloA 5,000 acres (2,000 ha) island formed by the Sacramento River to the southeast and Elk Slough to the west, located directly across the Sacramento from Hood.
Ryer Island38°14′26″N 121°38′03″W / 38.2405°N 121.6341°W / 38.2405; -121.6341 (Ryer Island)Solano4,750-hectare (11,700-acre), bounded by Miner Slough and Steamboat Slough.
Sherman Island38°03′34″N 121°44′00″W / 38.0594°N 121.7333°W / 38.0594; -121.7333 (Sherman Island)Sacramento5,500-hectare (14,000-acre) island bounded by the Sacramento River, Three Mile Slough, and the San Joaquin River.
Staten Island38°09′52″N 121°30′59″W / 38.1644°N 121.5163°W / 38.1644; -121.5163 (Staten Island)San Joaquin3,700-hectare (9,100-acre) island bounded and flanked by the North Mokelumne River and South Mokelumne River.
Sutter Island38°17′29″N 121°35′35″W / 38.2913°N 121.5930°W / 38.2913; -121.5930 (Sutter Island)SacramentoFormed by Sacramento River to the northeast, Steamboat Slough to the southeast, and Sutter Slough to the west. Located across the Sacramento River from Paintersville.
Twitchell Island38°06′35″N 121°38′55″W / 38.1096°N 121.6486°W / 38.1096; -121.6486 (Twitchell Island)Sacramento3,000-hectare (7,400-acre), bounded by Seven Mile Slough, San Joaquin River, and Three Mile Slough
Venice Island38°04′30″N 121°32′04″W / 38.0749°N 121.5344°W / 38.0749; -121.5344 (Venice Island)San Joaquin1,250-hectare (3,100-acre) island bounded by Potato Slough, Little Connection Slough, Stockton Deepwater Channel Venice Cut, and San Joaquin River.
Victoria Island37°53′24″N 121°32′05″W / 37.8899°N 121.5347°W / 37.8899; -121.5347 (Victoria Island)San Joaquin2,900-hectare (7,200-acre) island bounded by North Victoria Canal, Middle River, Victoria Canal, and Old River.
West Island38°01′24″N 121°46′43″W / 38.0233°N 121.7786°W / 38.0233; -121.7786 (West Island)Sacramento
Winter Island38°02′32″N 121°50′55″W / 38.0421°N 121.8486°W / 38.0421; -121.8486 (Winter Island)Contra Costa
Woodward Island37°55′42″N 121°32′46″W / 37.9283°N 121.5461°W / 37.9283; -121.5461 (Woodward Island)San Joaquin725-hectare (1,790-acre) island bounded by Bacon Island, Old River, Middle River, and Woodward Canal

Channel Islands[edit]

The Channel Islands are a group of eight main islands and several minor islands in the Pacific Ocean off the coast of Santa Barbara, Los Angeles, and Ventura counties in Southern California. The four northern islands are protected in Channel Islands National Park, while two are used by the U.S. Navy. These Islands are part of the Greater Los Angeles Area.

Anacapa IslandWest-anacapa.jpg34°00′16″N 119°23′59″W / 34.0045°N 119.3996°W / 34.0045; -119.3996 (Anacapa Island)[7]Located 14 miles (23 km) off the coast of Ventura, California. It contains 728 acres (295 ha) of land spread across three mountainous islets. The island has only three permanent residents. Part of the Greater Los Angeles Area.
Begg Rock33°21′45″N 119°41′52″W / 33.36250°N 119.69778°W / 33.36250; -119.69778 (Begg Rock)[8]A 15-foot (4.6 m) high rock, located 8 miles (13 km) from San Nicolas Island.
Prince Island34°03′29″N 120°20′01″W / 34.05806°N 120.33361°W / 34.05806; -120.33361 (Prince Island)Located near San Miguel Island and measures about 35 acres (14 ha).
San Clemente IslandSan-clemente-island.jpg32°54′00″N 118°30′03″W / 32.9000°N 118.5009°W / 32.9000; -118.5009 (San Clemente Island)[9]Southernmost Channel Island, containing 56.81 square miles (147.1 km2) of land. It is 24 miles (39 km) long, and uninhabited. An active U.S. Navy base is located on the island. In Los Angeles County.
San Miguel IslandSan-miguel-cuyler-hike.jpg34°02′23″N 120°22′31″W / 34.0397°N 120.3754°W / 34.0397; -120.3754 (San Miguel Island)[10]Westernmost Channel Island, measuring 8 miles (13 km) long, 3.7 miles (6.0 km) wide, and containing 9,325 acres (3,774 ha) of land. The island is uninhabited, and is rarely visited. Part of the Greater Los Angeles Area.
San Nicolas Island33°14′58″N 119°30′01″W / 33.2495°N 119.5004°W / 33.2495; -119.5004 (San Nicolas Island)[11]Is said to be the most remote island of the Channel Islands, and is used by the U.S. Navy as a weapons testing and training facility. It has no civilian inhabitants, but is inhabited by military personnel. It covers 14,562 acres (5,893 ha). Part of the Greater Los Angeles Area.
Santa Barbara IslandSantabarbara 300.jpg33°28′32″N 119°02′10″W / 33.4756°N 119.0362°W / 33.4756; -119.0362 (Santa Barbara Island)[12]Smallest Channel Island at 640 acres (260 ha) in area; it is located roughly between San Nicolas and Santa Catalina Islands. Part of the Greater Los Angeles Area.
Santa Catalina IslandLightmatter Avalon Bay.jpg33°23′00″N 118°25′03″W / 33.3834°N 118.4176°W / 33.3834; -118.4176 (Santa Catalina Island)[13]The most inhabited of the Channel Islands, with a population of 3,696 as of 2000. It is about 22 miles (35 km) long with a maximum width of 8 miles (13 km). It covers 74.98 square miles (194.2 km2). In Los Angeles County.
Santa Cruz IslandSantacruz 300.jpg34°02′25″N 119°50′37″W / 34.0403°N 119.8437°W / 34.0403; -119.8437 (Santa Cruz Island)[14]Santa Cruz Island measures 22 miles (35 km) long with an average width of 4 miles (6.4 km), covering 96.5 square miles (250 km2). It is the largest Channel Island. The island is now on public land, but was previously the largest privately owned island of the continental United States. Part of the Greater Los Angeles Area.
Santa Rosa IslandSanta rosa island view.JPG33°57′00″N 120°06′04″W / 33.9500°N 120.1010°W / 33.9500; -120.1010 (Santa Rosa Island)[15]Santa Rosa Island occupies 83.1 square miles (215 km2), and is the second largest Channel Island. The island has a permanent population of 2 persons, and is about 26 miles (42 km) off the coast of Santa Barbara, California. Part of the Greater Los Angeles area.
Shag Rock33°29′13″N 119°02′10″W / 33.4870°N 119.0362°W / 33.4870; -119.0362 (Shag Rock)[16]Small islet located off the north shore of Santa Barbara Island, and is only about 1 acre (0.40 ha).
Sutil Island33°27′50″N 119°02′54″W / 33.4639°N 119.0482°W / 33.4639; -119.0482 (Sutil Island)[17]Located off the southwest shore of Santa Barbara Island, and is about 12 acres (4.9 ha). It is named for a Spanish ship exploring the West Coast in an expedition led by Sebastián Vizcaíno.

Greater Los Angeles Area[edit]

The Greater Los Angeles Area is an urban area on the Pacific coast of southern California.

Island Chaffee33°44′23″N 118°08′20″W / 33.7397°N 118.1390°W / 33.7397; -118.1390 (Island Chaffee)An artificial island/oil platform named after astronaut Roger B. Chaffee who died in the Apollo 1 accident. Located in San Pedro Bay.
Deadman's IslandDeadmansIsland-SanPedro-1873.jpg33°43′25″N 118°15′57″W / 33.7236°N 118.2659°W / 33.7236; -118.2659 (Terminal Island)A former island in Los Angeles Harbor, removed in 1928 and sometimes referred to as Isla Del Umberto or Reservation Point.
Freeman Island33°44′29″N 118°09′45″W / 33.7414°N 118.1624°W / 33.7414; -118.1624 (Freeman Island)An artificial island/oil platform named after astronaut Theodore Freeman who died in a crash. Located in San Pedro Bay.
Island Grissom33°45′33″N 118°10′53″W / 33.7592°N 118.1815°W / 33.7592; -118.1815 (Island Grissom)An artificial island/oil platform named after astronaut Gus Grissom who died in the Apollo 1 accident. Located in San Pedro Bay.
Naples Islands33°27′05″N 118°43′12″W / 33.4515°N 118.7201°W / 33.4515; -118.7201 (Naples Islands)A neighborhood in Long Beach that consists of three different islands divided by canals which empty out into Alamitos Bay.
Terminal IslandTerminal-Island.jpg33°45′25″N 118°14′53″W / 33.7570°N 118.2481°W / 33.7570; -118.2481 (Terminal Island)An artificial island shared between the cities of Los Angeles and Long Beach. It is 3.5 miles (5.6 km) long and covers an area of 4.46 square miles (11.6 km2).
Island White33°45′10″N 118°09′33″W / 33.7528°N 118.1592°W / 33.7528; -118.1592 (Island White)An artificial island/oil platform named after astronaut Edward Higgins White who died in the Apollo 1 accident; Located in San Pedro Bay.[18][19]

Newport Bay[edit]

The bay associated with Newport Harbor and the city of Newport Beach, California.

Balboa IslandNewportBeach-Balboa-1921.jpg33°36′23″N 117°53′40″W / 33.60639°N 117.89444°W / 33.60639; -117.89444 (Balboa Island)A 50-hectare (120-acre), densely populated harbor island with 1,500 expensive homes. Partially created as a result of the Santa Ana River flooding in 1824, then artificially expanded to its present size.
Bay IslandBay Island Photo D Ramey Logan.jpg33°36′25″N 117°54′18″W / 33.607°N 117.905°W / 33.607; -117.905 (Bay Island)West of Balboa Island.
Harbor IslandHarbor Island NB CA 2 Photo D Ramey Logan.jpg33°36′01″N 117°54′10″W / 33.6003°N 117.9028°W / 33.6003; -117.9028 (Harbor Island)
Lido IsleNOAA map 18754 Newport Bay section1.jpg33°36′14″N 117°55′02″W / 33.6039°N 117.9173°W / 33.6039; -117.9173 (Lido Isle)Northwest of Balboa Island.
Linda IsleLinda Island NB CA Photo D Ramey Logan.JPG33°36′50″N 117°54′13″W / 33.6139°N 117.9037°W / 33.6139; -117.9037 (Linda Isle)North of Harbor Island.

Lake islands[edit]

Beaver Island40°45′24″N 122°19′57″W / 40.7566°N 122.3325°W / 40.7566; -122.3325 (Beaver Island)Shasta LakeAn island in the Pit River Arm of the lake, located just west of the Pit River Bridge and Bridge Bay Resort/marina.
Fannette IslandFannette.jpg38°57′15″N 120°06′02″W / 38.9541°N 120.1005°W / 38.9541; -120.1005 (Fannette Island)Lake TahoeThe only major island in Lake Tahoe, located within Emerald Bay.[20]
Main IslandLake Casitas from the air.jpg34°23′41″N 119°20′34″W / 34.3947°N 119.3429°W / 34.3947; -119.3429 (Main Island)Lake CasitasA 1.5 miles (2.4 km) long, 850-foot (260 m) high island rising 512 feet (156 m) above the lake surface.
Mullet IslandSalton SeaA small volcanic island near the southern end of the Salton Sea near the mouth of the Alamo River
Negit IslandNegit Island.jpg38°01′22″N 119°02′59″W / 38.0227°N 119.0496°W / 38.0227; -119.0496 (Negit Island)[21]Mono LakeA young volcanic cone, connected to the mainland during low water. It is an important stop for nesting birds, and as a result is closed to visitation during April.
Paoha IslandPaoha Island from visitor center.png38°00′02″N 119°01′57″W / 38.0005°N 119.0324°W / 38.0005; -119.0324 (Paoha Island)[22]Mono Lake2.5 miles (4.0 km) long and 2 miles (3.2 km) wide, and is the largest Mono Lake island.
Rattlesnake Island39°00′36″N 122°40′44″W / 39.0099°N 122.6789°W / 39.0099; -122.6789 (Rattlesnake Island)Clear LakeA 53-acre (21 ha) island desired by the Elem Indian Colony.
Red IslandSalton SeaA volcanic island near the southern end of the sea, on the San Andreas Fault.
Ridgeville Islands40°50′43″N 122°47′15″W / 40.8453°N 122.7875°W / 40.8453; -122.7875 (Ridgeville Islands)Trinity LakeA group of forested islets in the Stewart Fork arm about 4 mi (6.4 km) northwest of Trinity Dam.
Ski Island40°45′33″N 122°15′31″W / 40.7592°N 122.2587°W / 40.7592; -122.2587 (Ski Island)Shasta LakeAn island in the Pit River arm of the lake, located shortly north of Bear Mountain.
Slaughterhouse Island40°45′54″N 122°23′01″W / 40.7651°N 122.3835°W / 40.7651; -122.3835 (Slaughterhouse Island)Shasta LakeAn island in the Sacramento River Arm of the lake, located about 3 mi (4.8 km) northeast of Shasta Dam.


Rincon IslandRinconIsland1.jpg34°20′51″N 119°26′43″W / 34.3475°N 119.4454°W / 34.3475; -119.4454 (Rincon Island)A 1 acre (0.40 ha) artificial island off the coast of Ventura County, leased for oil and gas production.

See also[edit]


  1. ^ "GNIS Feature Search". Retrieved 2009-07-29. 
  2. ^ "Año Nuevo Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  3. ^ "Bird Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  4. ^ "Bird Rock". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  5. ^ "Atlas of Gulf of the Farallones Region, Central California". United States Geological Survey. Retrieved 2009-05-26. 
  6. ^ David L. Durham, "California's Geographic Names: A Gazetteer of Historic and Modern Names of This State," p. 693 (Quill Driver Books 1998) ISBN 1-884995-14-4.
  7. ^ "Anacapa Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  8. ^ "Begg Rock". Geographic Names Information System. U.S. Geological Survey. 
  9. ^ "San Clemente Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  10. ^ "San Miguel Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  11. ^ "San Nicolas Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  12. ^ "Santa Barbara Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  13. ^ "Santa Catalina Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  14. ^ "Santa Cruz Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  15. ^ "Santa Rosa Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  16. ^ "Shag Rock". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  17. ^ "Sutil Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  18. ^ Fallen Astronaut
  19. ^ pdf of City of Long Beach Economic Zones
  20. ^ "Fannette Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  21. ^ "Negit Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 
  22. ^ "Paoha Island". Geographic Names Information System. U.S. Geological Survey. Retrieved 2009-05-26. 

Further reading[edit]

External links[edit]