New Mexico

Union County San Juan County Colfax County Rio Arriba County Taos County Mora County Harding County Sandoval County McKinley County Santa Fe County Los Alamos County San Miguel County Sandoval County Quay County Cibola County Guadalupe County Bernalillo County Torrance County Curry County Valencia County DeBaca County Roosevelt County Catron County Socorro County Lincoln County Chaves County Lea County Sierra County Otero County Grant County Dona Ana County Eddy County Hidalgo County Luna County Luna County

COUNTY 2015 POPULATION SQUARE MILES COUNTY SEAT BOARD SIZE FOUNDED
Bernalillo County 676,685 1,167 Albuquerque  1852 
Catron County 3,456 6,929 Reserve  1921 
Chaves County 65,764 6,075 Roswell  1889 
Cibola County 27,329 4,542 Grants  1981 
Colfax County 12,414 3,768 Raton  1869 
Curry County 50,398 1,408 Clovis  1909 
De Baca County 1,828 2,334 Fort Sumner  1917 
Do±a Ana County 214,295 3,814 Las Cruces  1852 
Eddy County 57,578 4,198 Carlsbad  1887 
Grant County 28,609 3,968 Silver City  1868 
Guadalupe County 4,371 3,032 Santa Rosa  1891 
Harding County 698 2,126 Mosquero  1921 
Hidalgo County 4,423 3,446 Lordsburg  1920 
Lea County 71,180 4,394 Lovington  1917 
Lincoln County 19,420 4,831 Carrizozo  1869 
Los Alamos County* 17,785 109 Los Alamos  1949 
Luna County 24,518 2,965 Deming  1901 
McKinley County 76,708 5,455 Gallup  1899 
Mora County 4,596 1,934 Mora  1859 
Otero County 64,362 6,628 Alamogordo  1899 
Quay County 8,455 2,882 Tucumcari  1903 
Rio Arriba County 39,465 5,896 Tierra Amarilla  1852 
Roosevelt County 19,120 2,455 Portales  1903 
Sandoval County 139,394 3,716 Bernalillo  1903 
San Juan County 118,737 5,538 Aztec  1887 
San Miguel County 27,967 4,736 Las Vegas  1852 
Santa Fe County 148,686 1,911 Santa Fe  1852 
Sierra County 11,282 4,236 Truth Or Consequences  1884 
Socorro County 17,256 6,649 Socorro  1852 
Taos County 32,907 2,204 Taos  1852 
Torrance County 15,485 3,346 Estancia  1903 
Union County 4,201 3,831 Clayton  1903 
Valencia County 75,737 1,068 Los Lunas  1852 

* consolidated city-county government