THE SIERRA COUNTY LAND BRIEF
Land in the
Chihuahuan Basins and Playas setting.
Sierra County has 4,181.2 square miles of land in New Mexico. 11 mapped landscape regions meet across Sierra County: Chihuahuan Basins and Playas, Low Mountains and Bajadas, Conifer Woodlands and Savannas, among others.
Desert basins and mountain ranges extend across this region, with the Rio Grande and Pecos as important drainage corridors. Arid shrubland and grassland contrast with wooded higher elevations.
Regional context: Chihuahuan Deserts ↗ · Regional mapping across the county footprint
Where the landscape changes
Sierra County intersects 11 mapped regional units. The largest mapped shares are:
- Chihuahuan Basins and Playas40.1%
- Low Mountains and Bajadas18.7%
- Conifer Woodlands and Savannas9.9%
- Montane Conifer Forests9.4%
- Chihuahuan Desert Grasslands8.4%
Arizona/New Mexico Mountains in Sierra County
These southwestern mountain ranges rise above surrounding deserts and grasslands. Pinyon-juniper and oak woodlands give way to ponderosa pine, with colder forest types limited to the highest areas.
Read the regional source ↗Finding your parcel within Sierra County
The atlas lists 11 cities, towns, townships, and Census communities associated with Sierra County, including Truth or Consequences, Elephant Butte, Hillsboro. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Sierra County by land and water
The Census records 57 square miles of water within Sierra County, or 1.3% of its total area. That share is close to Sierra County’s 1.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sierra County has 1,000.5 times the land area of nearby Elephant Butte city (4.18 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Catron County, Doña Ana County, Grant County, Lincoln County, Luna County, Otero County, Socorro County within New Mexico. A tract near one of these lines should be matched to the county identifier on its own records.

