LIST BY COUNTY
-
BERNALILLO County
-
Founded 1852 ​
-
County Seat: Albuquerque
-
Largest City: Albuquerque
-
San Antonito (Semi Ghost Town)
-
-
CATRON County ​
-
Founded February 25, 1921​
-
County Seat: Reserve
-
Largest City: Reserve
-
Named for Thomas B. Catron
-
-
CHAVES County
-
​Founded February 25, 1889
-
County Seat: Roswell
-
Largest City: Roswell
-
Named for Jose Francisco Chavez
-
-
CIBOLA county
-
​Founded June 19, 1981
-
County Seat: Grants
-
Largest City: Grants
-
Named for Mythical Seven Cities of Cibola
-
-
COLFAX county
-
​Founded January 25, 1869
-
County Seat: Raton
-
Named for Schuyler Colfax
-
-
CURRY county
-
​Founded February 25, 1909
-
County Seat: Clovis
-
Largest City: Clovis
-
Named for George Curry
-
-
DE BACA county
-
​Founded February 28, 1917
-
County Seat: Fort Sumner
-
Largest City: Village of Fort Sumner
-
Named for Ezequiel Cabeza De Baca
-
-
DONA ANA county
-
​Founded 1852
-
County Seat: Las Cruces
-
Largest City: Las Cruces
-
-
EDDY county
-
​Founded May 16, 1891
-
County Seat: Carlsbad
-
Largest City: Carlsbad
-
Named for Charles Eddy, a local rancher
-
-
GRANT county
-
​Founded 1868
-
County Seat: Silver City
-
Largest City: Silver City
-
Named for Ulysses S. Grant
-
-
GUADALUPE county
-
​Founded February 26, 1891
-
County Seat: Santa Rosa
-
Largest City: Santa Rosa
-
Named for Our Lady of Guadalupe
-
-
Harding county
-
Founded March 4, 1921
-
County Seat: Mosquero
-
Largest City: Village of Roy
-
Named for Warren G. Harding
-
-
Hidalgo county
-
​Founded January 1, 1920
-
County Seat: Lordsburg
-
Largest City: Lordsburg
-
Named for Villa de Guadalupe Hidalgo
-
-
Lea county
-
Founded March 17, 1917
-
County Seat: Lovington
-
Largest City: Hobbs
-
-
Lincoln county
-
​Founded 1869
-
County Seat: Carrizozo
-
Largest City: Ruidoso
-
Named for Abraham Lincoln
-
-
Los Alamos county
-
Founded 1949
-
County Seat: Los Alamos
-
Largest City: Los Alamos
-
-
Luna county
-
​Founded March 16, 1901
-
County Seat: Deming
-
Largest City: Deming
-
Named for Solomon Luna
-
-
McKinley County
-
Founded January 1, 1901
-
County Seat: Gallup
-
Largest City: Gallup
-
Named for William McKinley
-
-
Mora county
-
​Founded February 1, 1860
-
County Seat: Mora
-
Largest Village: Mora
-
Named for Mora, New Mexico
-
-
Otero county
-
Founded January 30, 1899
-
County Seat: Alamogordo
-
Largest City: Alamogordo
-
Named for Miguel Antonio Otero
-
-
Quay county
-
​Founded February 28, 1903
-
County Seat: Tucumcari
-
Largest City: Tucumcari
-
Named for Matthew Quay
-
-
Rio Arriba county
-
​Founded 1852
-
County Seat: Tierra Amarilla
-
Largest City: Espanola
-
Named for location on the upper Rio Grande (Rio Arriba means "upriver" in Spanish)
-
-
Roosevelt county
-
​Founded February 28, 1903
-
County Seat: Portales
-
Largest City: Portales
-
Named for Theodore Roosevelt
-
-
San Juan county
-
Founded February 24, 1887
-
County Seat: Aztec
-
Largest City: Farmington
-
Named for San Juan River
-
-
San Miguel county
-
Founded January 9, 1852 ​
-
County Seat: Las Vegas
-
Largest City: Las Vegas
-
Named for San Miguel del Vado
-
-
Sandoval county
-
Founded 1903​
-
County Seat: Bernalillo
-
Largest City: Rio Rancho
-
Named for Sandoval family
-
-
Santa Fe County
-
Founded​ 1852
-
County Seat: Santa Fe
-
Largest City: Santa Fe
-
-
Sierra County
-
Founded 1884​
-
County Seat: Truth or Consequences
-
Largest City: Truth or Consequences
-
Named for the Black Range (Spanish: Sierra Diablo)
-
-
Socorro county
-
Founded ​January 9, 1852
-
County Seat: Socorro
-
Largest City: Socorro
-
-
Taos county
-
Founded January 9, 1852​
-
County Seat: Taos
-
Largest City: Taos
-
-
Torrance county
-
Founded March 16, 1903​
-
County Seat: Estancia
-
Largest City: Moriarty
-
-
Union county
-
Founded January 1, 1894​
-
County Seat: Clayton
-
Largest City: Clayton
-
-
Valencia county
-
Founded January 9, 1852​
-
County Seat: Los Lunas
-
Largest City: Los Lunas
-
Named for Valencia, New Mexico
-