THE SAN JUAN COUNTY LAND BRIEF
Land in the
San Juan/Chaco Tablelands and Mesas setting.
San Juan County has 5,517.2 square miles of land in New Mexico. 7 mapped landscape regions meet across San Juan County: San Juan/Chaco Tablelands and Mesas, Semiarid Benchlands and Canyonlands, Northern Woodlands and Sagebrush, among others.
Plains and mesa tops alternate with steep tableland edges in this transition between deserts, grasslands and forested mountains. Local relief changes sharply even within the broader plateau setting.
Regional context: Arizona/New Mexico Plateau ↗ · Regional mapping across the county footprint
Where the landscape changes
San Juan County intersects 7 mapped regional units. The largest mapped shares are:
- San Juan/Chaco Tablelands and Mesas69.2%
- Semiarid Benchlands and Canyonlands15.7%
- Northern Woodlands and Sagebrush4.5%
- Shale Deserts and Sedimentary Basins4.2%
- Montane Conifer Forests4.1%
Colorado Plateaus in San Juan County
Layered sedimentary rock forms mesas, benches, cliffs and deeply cut canyons. Pinyon-juniper woodland, oak and drier basin vegetation vary with elevation and the plateau's strongly contrasting terrain.
Read the regional source ↗Arizona/New Mexico Mountains in San Juan 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 San Juan County
The atlas lists 37 cities, towns, townships, and Census communities associated with San Juan County, including Farmington, La Plata, Crouch Mesa. The list includes overlapping geography types and does not divide the county into exclusive service areas.
San Juan County by land and water
The Census records 21.2 square miles of water within San Juan County, or 0.4% of its total area. That share is close to San Juan County’s 0.4%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, San Juan County has 1,239.5 times the land area of nearby Napi Headquarters CDP (4.45 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets McKinley County, Rio Arriba County, Sandoval County within New Mexico. A tract near one of these lines should be matched to the county identifier on its own records.

