San Juan County, New Mexico

San Juan County population, land area and income

San Juan County had 120,817 residents in the Census Vintage 2024 estimate, on 5,517.2 square miles of land. It ranks 5th of 33 in New Mexico by population and 6th by land area. That works out to 21.9 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in New Mexico has 26,428 residents, so San Juan County is 4.6 times that size.

Its SAIPE 2023 median household income of $57,296 is below the national county median among 3,143 counties with an estimate.

How San Juan County's population changed since 2020

San Juan County lost 570 residents between the July 2020 and July 2024 estimates, a drop of 0.5%. That ranks 13th of 33 in New Mexico for growth. The median New Mexico county changed by -1.3%, and the state as a whole by +0.5%.

Since the April 2020 estimates base, San Juan County recorded 5,672 births and 6,393 deaths, a natural change of -721. Net international migration added +603 and net domestic migration, people moving to or from other US counties, came to -761. The largest single component was domestic migration, which removed 761 people.

Where San Juan County is

The Census internal point of San Juan County is at 36.511600, -108.324600. It sits in UTM zone 12N. The map shades New Mexico's 33 county-equivalents by population change from 2020 to 2024, darker for faster growth, with San Juan County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in San Juan County

3 incorporated places of 1,000+ people have residents in San Juan County, 59,754 people together, or 49% of the county. Each figure counts only the part of the town inside San Juan County; towns marked "part" extend into another county. The largest is Farmington with 46,262.

Counties bordering San Juan County

The Census 2024 county adjacency file lists 8 neighbors for San Juan County, including 5 across a state line. The most populous is Sandoval County, NM, with 157,757 residents. Distances run between Census internal points in a straight line.

• Sandoval County

  157,757 people

  99 mi SE

• McKinley County

  68,945 people

  64 mi S

• AZ

  Apache County, AZ

  64,800 people

  102 mi SW

• CO

  La Plata County, CO

  56,823 people

  60 mi NNE

• Rio Arriba County

  39,955 people

  91 mi E

• CO

  Montezuma County, CO

  26,841 people

  59 mi NNW

• UT

  San Juan County, UT

  14,601 people

  111 mi NW

• CO

  Archuleta County, CO

  14,112 people

  85 mi NE

Distance to Santa Fe and the nearest big city

Santa Fe is 144.9 miles ESE of San Juan County's internal point in a straight line. The nearest place of 100,000 or more is Rio Rancho, NM (population 112,524), 124.3 miles away. The nearest place of 10,000 or more is Farmington, NM (population 46,262), 18.5 miles away.

San Juan County FIPS code

The FIPS code of San Juan County is 35045: state code 35 for New Mexico plus county code 045. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $57,296.