List of counties in New Mexico

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De Baca
Rio Arriba
San Juan
San Miguel
Great seal of the state of New Mexico.png
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New Mexico

This is a list of the 33 counties in the U.S. state of New Mexico. There were originally nine counties formed in 1852. Santa Ana County, New Mexico Territory, one of the nine original counties, was annexed in 1876 to Bernalillo County, New Mexico.

The Federal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each entry.[1] New Mexico's code is 35, which when combined with any county code would be written as 35XXX. The FIPS code for each county links to census data for that county.


For comparison, the population estimate for the state of New Mexico as of July 2011 was 2,082,224, and the area was 121,589 mi² (315,194 km²).

CountyFIPS Code
County Seat
Formed from
Bernalillo County001Albuquerque1852One of the nine original counties.The Gonzales-Bernal family, Spanish nobles who settled the territory in the seventeenth century670,9681,166 mi²
(3,020 km²)
State map highlighting Bernalillo County
Catron County003Reserve1921Part of Socorro County.Thomas Benton Catron, a Santa Fe attorney and New Mexico's first U.S. Senator3,7336,928 sq mi
(17,943 km2)
State map highlighting Catron County
Chaves County005Roswell1889Part of Lincoln County.Jose Francisco Chaves, a U.S. Army colonel in New Mexico during and after the Civil War65,8906,071 sq mi
(15,724 km2)
State map highlighting Chaves County
Cibola County006Grants1981Parts of Valencia County, Socorro County, McKinley County, and Catron County.The mythical Seven Cities of Cibola27,6584,540 sq mi
(11,759 km2)
State map highlighting Cibola County
Colfax County007Raton1869Part of Mora County.Schuyler Colfax, the seventeenth vice president of the United States13,6403,757 sq mi
(9,731 km2)
State map highlighting Colfax County
Curry County009Clovis1909Parts of Quay County and Roosevelt County.George Curry, a governor of New Mexico Territory from 1907 to 191049,6491,406 sq mi
(3,642 km2)
State map highlighting Curry County
De Baca County011Fort Sumner1917Parts of Chaves County and Guadalupe County.Ezequiel Cabeza de Baca, the second state governor of New Mexico1,9452,325 sq mi
(6,022 km2)
State map highlighting De Baca County
Doña Ana County013Las Cruces1852One of the nine original counties.Doña Ana Robledo, a seventeenth-century Spanish woman known for her charitable giving to the native population213,5983,807 sq mi
(9,860 km2)
State map highlighting Doña Ana County
Eddy County015Carlsbad1887Part of Lincoln County.Charles Eddy, a rancher and developer of the area54,1524,182 sq mi
(10,831 km2)
State map highlighting Eddy County
Grant County017Silver City1868Part of Doña Ana County.Ulysses Simpson Grant, the Civil War general and eighteenth president of the United States29,3803,966 sq mi
(10,272 km2)
State map highlighting Grant County
Guadalupe County019Santa Rosa1891Part of San Miguel County.Our Lady of Guadalupe, the patron saint of the Americas4,6193,031 sq mi
(7,850 km2)
State map highlighting Guadalupe County
Harding County021Mosquero1921Parts of Mora County and Union County.Warren Gamaliel Harding, the twenty-ninth president of the United States7402,126 sq mi
(5,506 km2)
State map highlighting Harding County
Hidalgo County023Lordsburg1920Part of Grant County.Miguel Hidalgo y Costilla, the priest who is known as the Father of Mexican Independence4,8613,446 sq mi
(8,925 km2)
State map highlighting Hidalgo County
Lea County025Lovington1917Parts of Chaves County and Eddy County.Joseph Calloway Lea, a captain in the U.S. Army and the founder of the New Mexico Military Academy65,4234,393 sq mi
(11,378 km2)
State map highlighting Lea County
Lincoln County027Carrizozo1869Part of Socorro County.Abraham Lincoln, the sixteenth president of the United States20,4544,831 sq mi
(12,512 km2)
State map highlighting Lincoln County
Los Alamos County028Los Alamos1949Parts of Sandoval County and Santa Fe County.Named for its county seat of Los Alamos, New Mexico, which itself is the Spanish name for the cottonwood tree18,222109 sq mi
(282 km2)
State map highlighting Los Alamos County
Luna County029Deming1901Parts of Doña Ana County and Grant County.Solomon Luna, the largest land owner in the county at the time of its creation; itself Spanish for moon25,2812,965 sq mi
(7,679 km2)
State map highlighting Luna County
McKinley County031Gallup1899Part of Bernalillo County.William McKinley, the twenty-fifth president of the United States73,6645,449 sq mi
(14,113 km2)
State map highlighting McKinley County
Mora County033Mora1859Part of Taos County.Named for its county seat of Mora, New Mexico, which is itself named after lo de mora, the Spanish term for blackberry4,7731,931 sq mi
(5,001 km2)
State map highlighting Mora County
Otero County035Alamogordo1899Parts of Doña Ana County and Lincoln County.Miguel A. Otero, territorial delegate to U. S. Congress65,7036,627 sq mi
(17,164 km2)
State map highlighting Otero County
Quay County037Tucumcari1903Part of Guadalupe County.Matthew Stanley Quay, a U.S. Senator from Pennsylvania who supported New Mexico's statehood9,0262,855 sq mi
(7,394 km2)
State map highlighting Quay County
Rio Arriba County039Tierra Amarilla1852One of the nine original counties.Named for its location on the upper Rio Grande (Rio Arriba is "upper river" in Spanish)40,4465,858 sq mi
(15,172 km2)
State map highlighting Rio Arriba County
Roosevelt County041Portales1903Parts of Chaves County and Guadalupe County.Theodore Roosevelt, the twenty-sixth president of the United States20,4462,449 sq mi
(6,343 km2)
State map highlighting Roosevelt County
Sandoval County043Bernalillo1903Part of Bernalillo County.Named for the Sandoval family, prominent seventeenth-century Spanish landowners134,2593,710 sq mi
(9,609 km2)
State map highlighting Sandoval County
San Juan County045Aztec1887Part of Rio Arriba County.San Juan River, itself named after the Catholic saint128,2005,514 sq mi
(14,281 km2)
State map highlighting San Juan County
San Miguel County047Las Vegas1852One of the nine original counties.San Miguel de Bado Catholic Church, the first in the area29,3014,717 sq mi
(12,217 km2)
State map highlighting San Miguel County
Santa Fe County049Santa Fe1852One of the nine original counties.Spanish term meaning "holy faith," which refers to the spirituality of the founding missionaries145,6481,909 sq mi
(4,944 km2)
State map highlighting Santa Fe County
Sierra County051Truth or Consequences1884Parts of Doña Ana County and Socorro County.Possibly named for the Black Range. (Sierra is mountain range in Spanish.)11,9434,180 sq mi
(10,826 km2)
State map highlighting Sierra County
Socorro County053Socorro1852One of the nine original counties.Spanish term meaning "aid," which refers to the help Native Americans gave to starving travelers17,8736,647 sq mi
(17,216 km2)
State map highlighting Socorro County
Taos County055Taos1852One of the nine original counties.Named for its county seat of Taos, New Mexico, which in turn was named for the nearby Taos Pueblo, an ancient Native American village. Taos is red willow in the Tiwa language32,9172,203 sq mi
(5,706 km2)
State map highlighting Taos County
Torrance County057Estancia1903Parts of Bernalillo County, Valencia County, and Socorro County.Francis J. Torrance, the developer of the New Mexico Central Railroad16,3453,345 sq mi
(8,664 km2)
State map highlighting Torrance County
Union County059Clayton1893Parts of Colfax County, Mora County and San Miguel County.Named for the "union" of the three counties which donated land to form the new county4,4333,830 sq mi
(9,920 km2)
State map highlighting Union County
Valencia County061Los Lunas1852One of the nine original counties.Named for the town of Valencia, New Mexico, which is itself named for Valencia, Spain77,0701,068 sq mi
(2,766 km2)
State map highlighting Valencia County

Former counties[edit]

See also[edit]


  1. ^ "FIPS Publish 6-4". National Institute of Standards and Technology. Retrieved 2007-08-06. 
  2. ^ "EPA County FIPS Code Listing". US Environmental Protection Agency. Retrieved 2007-08-06. 
  3. ^ a b c "NACo - Find a county". National Association of Counties. Archived from the original on 2007-09-30. Retrieved 2007-08-07. 
  4. ^ "NMGenWeb Counties". Archived from the original on 2007-07-02. Retrieved 2007-08-06. 
  5. ^ Viva New Mexico County Names
  6. ^
  7. ^ "New Mexico QuickFacts". U.S. Census Bureau. Retrieved 2007-08-07.  (2000 Census)

External links[edit]