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List of New Mexico Counties and County Seats





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The U.S. state of New Mexico is divided into 33 counties. Explore list of California Counties and their County Seats in alphabetical order populations, areas and the date of formation.

List of New Mexico Counties and County Seat

S.NCountyCounty SeatPopulation(2011)Area Formed
1Bernalillo CountyAlbuquerque6709681,166 mi²1852
2Catron CountyReserve37336,928 sq mi1921
3Chaves CountyRoswell658906,071 sq mi1889
4Cibola CountyGrants276584,540 sq mi1981
5Colfax CountyRaton136403,757 sq mi1869
6Curry CountyClovis496491,406 sq mi1909
7De Baca CountyFort Sumner19452,325 sq mi1917
8Doña Ana CountyLas Cruces2135983,807 sq mi1852
9Eddy CountyCarlsbad541524,182 sq mi1887
10Grant CountySilver City293803,966 sq mi1868
11Guadalupe CountySanta Rosa46193,031 sq mi1891
12Harding CountyMosquero7402,126 sq mi1921
13Hidalgo CountyLordsburg48613,446 sq mi1920
14Lea CountyLovington654234,393 sq mi1917
15Lincoln CountyCarrizozo204544,831 sq mi1869
16Los Alamos CountyLos Alamos18222109 sq mi1949
17Luna CountyDeming252812,965 sq mi1901
18McKinley CountyGallup736645,449 sq mi1899
19Mora CountyMora47731,931 sq mi1859
20Otero CountyAlamogordo657036,627 sq mi1899
21Quay CountyTucumcari90262,855 sq mi1903
22Rio Arriba CountyTierra Amarilla404465,858 sq mi1852
23Roosevelt CountyPortales204462,449 sq mi1903
24San Juan CountyAztec1282005,514 sq mi1887
25San Miguel CountyLas Vegas293014,717 sq mi1852
26Sandoval CountyBernalillo1342593,710 sq mi1903
27Santa Fe CountySanta Fe1456481,909 sq mi1852
28Sierra CountyTruth or Consequences119434,180 sq mi1884
29Socorro CountySocorro178736,647 sq mi1852
30Taos CountyTaos329172,203 sq mi1852
31Torrance CountyEstancia163453,345 sq mi1903
32Union CountyClayton44333,830 sq mi1893
33Valencia CountyLos Lunas770701,068 sq mi1852