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West county atlas

New Mexico county map

Explore all 33 counties. Select a county to see its map, or download a copy for your next project.

2025 Census boundaries33 mapped unitsCapital: Santa Fe
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Boundary map 100%
Labelled map of New Mexico counties Bernalillo CountyCatron CountyChaves CountyCibola CountyColfax CountyCurry CountyDe Baca CountyDoña Ana CountyEddy CountyGrant CountyGuadalupe CountyHarding CountyHidalgo CountyLea CountyLincoln CountyLos Alamos CountyLuna CountyMcKinley CountyMora CountyOtero CountyQuay CountyRio Arriba CountyRoosevelt CountySan Juan CountySan Miguel CountySandoval CountySanta Fe CountySierra CountySocorro CountyTaos CountyTorrance CountyUnion CountyValencia County
Select a county to highlight its boundary.
2025 U.S. Census boundaries. Zoom to reveal more names. Drag to pan when zoomed; use arrow keys, + and − with the map focused.

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Choose a format for printing, editing, or sharing. All downloads are free.

SVG

SVG is editable vector artwork. PNG is a high-resolution image. PDF uses landscape Letter pages, with a separate key when needed.

Downloads contain the complete boundary map, independent of zoom. Crowded names use a numbered key. Numbered quiz maps use the county list / answer key (CSV). Boundary data (GeoJSON) · Reuse with source credit.

Roads, terrain & aerial imagery

Explore New Mexico with a county boundary overlay. Choose a view to load the interactive map.

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Street names, terrain, or aerial photography with the county boundary in view.

Backgrounds load from OpenStreetMap or USGS only when selected. Imagery dates and detail vary by location.

Map scope: Use the boundary map for names and shapes, or the interactive background viewer for roads, terrain, and aerial imagery. County boundaries do not identify parcels or ZIP codes.

New Mexico county geography overview

New Mexico has 33 counties, which places it 35th among the 50 state and District of Columbia maps in this atlas when ordered by number of county-level units. Their combined 121,313.1 square miles of land place the state 5th by mapped land area.

The average county-level area is 3,676 square miles, while the median is 3,758 square miles. The median is often the better description of a typical unit because one or two very large areas can pull the average upward. The five largest units together account for about 26% of the state’s mapped land area.

33county-level units
3,758 sq mimedian land area
6,924.2 sq milargest unit
0%share of mapped area that is water

Largest and smallest New Mexico counties

Catron County is the largest county-level unit by land area at 6,924.2 square miles. It represents about 6% of all mapped land in New Mexico. At the other end of the range, Los Alamos County has 109.1 square miles of land.

Largest by land area

  1. Catron County6,924.2 sq mi
  2. Socorro County6,646.4 sq mi
  3. Otero County6,612.6 sq mi
  4. Chaves County6,067.2 sq mi
  5. Rio Arriba County5,860.9 sq mi

Smallest by land area

  1. Los Alamos County109.1 sq mi
  2. Valencia County1,066.7 sq mi
  3. Bernalillo County1,161.2 sq mi
  4. Curry County1,405.5 sq mi
  5. Santa Fe County1,910.4 sq mi

Rankings use land area rather than total area. This avoids making coastal or lake counties appear larger solely because their boundaries include extensive water.

Alphabetical list of New Mexico counties

The table is alphabetical, so it works as a name and FIPS-code reference rather than an area ranking. Every identifier begins with the New Mexico state FIPS prefix 35. Land and water figures are rounded to one decimal place.

33 county-level areas

Download county data / numbered map key (CSV)
No.NameFIPS codeLand areaWater area
1Bernalillo County350011,161.2 sq mi6.1 sq mi
2Catron County350036,924.2 sq mi5.5 sq mi
3Chaves County350056,067.2 sq mi7.9 sq mi
4Cibola County350064,540 sq mi2.1 sq mi
5Colfax County350073,758 sq mi10.2 sq mi
6Curry County350091,405.5 sq mi3.1 sq mi
7De Baca County350112,323.1 sq mi11.2 sq mi
8Doña Ana County350133,808.2 sq mi6.8 sq mi
9Eddy County350154,176.3 sq mi21.8 sq mi
10Grant County350173,961.2 sq mi5.9 sq mi
11Guadalupe County350193,029.8 sq mi1.1 sq mi
12Harding County350212,125.5 sq mi0.4 sq mi
13Hidalgo County350233,438.6 sq mi9.1 sq mi
14Lea County350254,391.6 sq mi3.1 sq mi
15Lincoln County350274,831.1 sq mi0.2 sq mi
16Los Alamos County35028109.1 sq mi0.1 sq mi
17Luna County350292,965.2 sq mi0.2 sq mi
18McKinley County350315,451.1 sq mi4.9 sq mi
19Mora County350331,926.3 sq mi2.3 sq mi
20Otero County350356,612.6 sq mi14.3 sq mi
21Quay County350372,874 sq mi7.2 sq mi
22Rio Arriba County350395,860.9 sq mi35.3 sq mi
23Roosevelt County350412,446.1 sq mi7.2 sq mi
24San Juan County350455,517.2 sq mi21.2 sq mi
25San Miguel County350474,721.5 sq mi19.8 sq mi
26Sandoval County350433,710.2 sq mi4.2 sq mi
27Santa Fe County350491,910.4 sq mi1 sq mi
28Sierra County350514,181.2 sq mi57 sq mi
29Socorro County350536,646.4 sq mi1.9 sq mi
30Taos County350552,202.4 sq mi1.3 sq mi
31Torrance County350573,345.2 sq mi0.9 sq mi
32Union County350593,825.1 sq mi6 sq mi
33Valencia County350611,066.7 sq mi1.1 sq mi

How to read and use this map

County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.

For classroom or planning use, download a PDF from the controls above. Labelled exports use numbered callouts for crowded areas; numbered quiz maps match the alphabetical county list. SVG files keep the boundary lines sharp at larger paper sizes.

Frequently asked questions

How many counties are in New Mexico?

New Mexico has 33 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.

Can I print this New Mexico county map?

Yes. Choose Download / print and select PDF for a landscape Letter page, PNG for an image, or SVG for editable vector artwork. Because the map is SVG, its boundary lines stay sharp when scaled.

What is the largest county in New Mexico?

Catron County is the largest by land area in this dataset at 6,924.2 square miles. This is an area ranking, not a population ranking.

What is the smallest county in New Mexico?

Los Alamos County is the smallest by land area in this dataset at 109.1 square miles.

Are these legal survey boundaries?

No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.

Map source

U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:5,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 27, 2026.