Settlers traded goods with the indigenous Secatogue tribe for the land that became Dix Hills in 1699. The Secatogues lived in the northern portion of the region during the later half of that century. The land was known as Dick's Hills. By lore, the name traces to a local native named Dick Pechegan, likely of the Secatogues.[note 1] Scholar William Wallace Tooker wrote that the addition of the English name "Dick" to the indigenous name "Pechegan" was a common practice. Tooker wrote that Pechegan's wigwam and his planted fields became the hilly area's namesake, known as the shortened "Dix Hills" by 1911. The area was mostly used for farming until after World War II.
The town of Huntington was founded in 1653, and the area to the north of Half Way Hollow was first referred to as "dicke pechegans" in 1689, marking the area where Dick Pechagan, an indigenous person from one of the local tribes, had his wigwam and his planting fields. Over the years this name was shortened and changed to "Dick's Hills," and although a few old records do use that spelling, it quickly became even easier to just spell "Dix". While Half Hollow Hills marks the hills located halfway between Long Island Sound and the Atlantic Ocean, Dix Hills marks the hills that belonged to a man named Dick.
According to the United States Census Bureau, the CDP of Dix Hills has a total area of 15.9 square miles (41.3 km2), all of it land. The town of Huntington, of which Dix Hills is a part, has a total area of 137.1 square miles (355.1 km2), of which 94.1 square miles (243.8 km2) is land and 43.0 square miles (111.3 km2), or 31.35%, is water.
Dix Hills is served by the Half Hollow Hills Central School District and the Commack School District. The Half Hollow Hills elementary schools are Chestnut Hill (pending closure), Forest Park, Otsego, Paumanok, Signal Hill, Sunquam, and Vanderbilt. The middle schools that serve the district are Candlewood Middle School and West Hollow Middle School. The high schools are Half Hollow Hills High School East and Half Hollow Hills High School West. Commack Middle School and Rolling Hills Elementary are both a part of the Commack School District and are located within Dix Hills. Commack High School is ranked as the 95th best school in the country.Five Towns College is also located within Dix Hills.
Dix Hills is served by the Dix Hills Fire Department, through three stations. The Dix Hills Fire Department's headquarters (Company 2) is located on Deer Park Avenue, immediately north of the Northern State Parkway. Substation #1 (Company 3) is located on Deer Park Avenue, south of the Long Island Expressway. Substation #2 (Company 1) is located on Carll's Straight Path, about half of a mile south of the Long Island Expressway. The Dix Hills Fire Department consists of approximately 150 volunteer firefighters and emergency medical technicians who respond to over 2,500 calls for assistance each year – ranging from fires to motor vehicle accidents to medical and traumatic emergencies. The department has four ambulances, three Heavy Rescue trucks, two pumpers, two Brush Trucks, one quintuple pumper, one Stump Jumper, and utility vehicles. It is operated under a Board of Fire Commissioners as well as one chief and three assistant chiefs.
There were 7,952 households out of which 44.8% had children under the age of 18 living with them, 82.1% were married couples living together, 6.1% had a female householder with no husband present, and 9.0% were non-families. 7.1% of all households were made up of individuals and 3.0% had someone living alone who was 65 years of age or older. The average household size was 3.25 and the average family size was 3.39.
In the CDP the population was spread out with 28.5% under the age of 18, 5.5% from 18 to 24, 27.1% from 25 to 44, 28.8% from 45 to 64, and 10.1% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 98.2 males. For every 100 females age 18 and over, there were 94.7 males.
According to a 2007 estimate, the median income for a household in the CDP was $137,632, and the median income for a family was $150,271. Males had a median income of over $100,000 versus $72,361 for females. The per capita income for the CDP was $93,426. About 2.1% of families and 1.9% of the population were below the poverty line, including 3.1% of those under age 18 and 2.2% of those age 65 or over.
Dix Hills was named the 19th most affluent U.S. neighborhood by Forbes.
^Castillo, Alfonso A. (February 18, 2008). "FRIDAY: Pro wrestling comes to concert hall". McClatchy - Tribune Business News – via ProQuest. "... said Brother Ray, one half of TNA tag team champions, Team 3D, and a native Long Islander. The 6-foot-4, 310-pound former Dix Hills resident expects ... recalling his days performing as one half of the Dudley Boyz in WWE."(Subscription required.)
^Gay, Verne (March 21, 2011). "ON TV: Macchio mambo?". Newsday (Cablevision). p. A14 – via ProQuest. "Ralph Macchio, the original "Karate Kid," ... was born in Huntington, raised in Dix Hills, and attended Half Hollow Hills West High, graduating in 1979."(Subscription required.)
^Guzmán, Rafer (March 26, 2009). "Dix Hills' Greg Mottola relives 'Adventureland'". Newsday. Cablevision. Archived from the original on December 28, 2013. Retrieved December 28, 2013 – via ProQuest: Newsday (1985–present). "... Greg Mottola, a Dix Hills native whose 1984 summer job there inspired his new film, "Adventureland," may have an explanation. ... His 1996 debut, the satirical drama "The Daytrippers" (featuring Hope Davis, Liev Schreiber and Parker Posey), followed a dysfunctional Long Island family on an eventful drive into Manhattan. His second, more famous film, "Superbad," was a super-crude comedy starring then-unknowns Jonah Hill and Michael Cera."
^Guzman, Rafer (November 4, 2010). "'Due Date' director helps father go further". Newsday (Cablevision). p. B10 – via ProQuest. "Fans of "Old School" and "The Hangover" may recognize the name of writer-director Todd Phillips. ... Raised in Dix Hills but now based in Los Angeles, Phillips ..."(Subscription required.)
^Anderson, John (May 19, 2013). "Cure for 'Hangover'?". Newsday (Cablevision). p. C6 – via ProQuest. "Phillips, who grew up in Dix Hills and whose comedies include 'Due Date,' 'Starsky & Hutch' and 'Old School,' ..."(Subscription required.)
^Guzman, Rafer (May 22, 2011). "Drunk with success: The Hangover bad boys are back for more monkey business, this time in Bangkok". Newsday (Cablevision). p. C8 – via ProQuest. "'The Hangover,' directed by Dix Hills-raised Todd Phillips, eventually became the highest-grossing R-rated comedy."(Subscription required.)
^Lipson, Karin (April 23, 2003). "A Rookie Savors His Baptism by Fire Island / LI filmmaker shoots 'Mickey Stern' at his parents' beach house". Newsday (Cablevision). p. B2 – via ProQuest: Newsday (1985–present). ""We don't have an ad budget," the affable 28-year-old first-time director [Prywes], who grew up in Old Bethpage and Dix Hills, explained over his car phone."(Subscription required.)
^Baumbach, Jim (November 27, 2008). "Former Jets star Walker struggles with pain". McClatchy - Tribune Business News – via ProQuest. "[Walker] often prefers to be at his Dix Hills home ..."(Subscription required.)