120,817 people (2024 Census estimate, −0.5% since 2020)
5,517 square miles of land · 22 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
17 active community water systems list San Juan County in the area they serve, reporting 104,077 people served in all (a system that crosses county lines counts its whole population).
| FARMINGTON WATER SYSTEM surface water · local government · NM3510224 | 47,655 served |
| AZTEC DOMESTIC WATER SYSTEM surface water · local government · NM3509824 | 9,673 served |
| BLOOMFIELD WATER SUPPLY SYSTEM surface water · local government · NM3510124 | 9,536 served |
| LEE HAMMOND WATER surface water · private · NM3500624 | 8,817 served |
| LOWER VALLEY WATER USERS ASSOCIATION surface water · local government · NM3510324 | 8,683 served |
| MORNINGSTAR WATER SYSTEM buys surface water · private · NM3510524 | 5,694 served |
| NORTHSTAR MDWCA surface water · local government · NM3520024 | 3,784 served |
| FLORA VISTA MUTUAL DOMESTIC buys surface water · local government · NM3510024 | 3,726 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 526 people were held in San Juan County's jail, in Vera's latest figure (2023), or 691 per 100,000 residents ages 15–64. In 2018 it was about 660.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
4 school districts have their office in San Juan County. School taxes are usually the largest part of a property tax bill.
Spent $155.5 million — $143.3 million to run schools, about $12,791 per student, plus $10.1 million on buildings and equipment. Money in: $20.2 million local (mostly property tax), $116.6 million state, $25.4 million federal. Long-term debt: $71.6 million.
Spent $135.5 million — $118.2 million to run schools, about $23,470 per student, plus $16 million on buildings and equipment. Money in: $10 million local (mostly property tax), $65.8 million state, $66.2 million federal. Long-term debt: $23.9 million.
Spent $44.4 million — $39.3 million to run schools, about $15,195 per student, plus $4.2 million on buildings and equipment. Money in: $15.8 million local (mostly property tax), $30.4 million state, $8.6 million federal. Long-term debt: $24 million.
Spent $42.4 million — $37.5 million to run schools, about $14,624 per student, plus $4 million on buildings and equipment. Money in: $12.5 million local (mostly property tax), $30.4 million state, $5.6 million federal. Long-term debt: $10.1 million.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively Moderate compared with other U.S. counties. FEMA estimates natural hazards cost San Juan County about $44.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
174 bridges in San Juan County: 60 in good condition, 104 fair, and 10 poor (5.7%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| IRR/US64/491 WBL over SAN JUAN RIVER · built 1936 | 16,829 vehicles a day |
| FL-4184 over ANIMAS RIVER · built 1929 | 6,361 vehicles a day |
| 45-6675 over SAN JUAN RIVER · built 1960 | 2,054 vehicles a day |
| FR-6664 over NASCHITTI WASH · built 1928 | 681 vehicles a day |
| 45-4599 over IRRIGATION DITCH · built 1966 | 681 vehicles a day |
| 45-Z003 over COX CANYON · built 1979 | 681 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $97.1 million of work in San Juan County in fiscal 2025, about $798 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for New Mexico are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for San Juan County come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have San Juan County built: brayden.ozark@gmail.com.
More of New Mexico: the state government and every county in New Mexico.
Nearby counties: Montezuma County, CO (59 mi) · La Plata County, CO (60 mi) · McKinley County (64 mi) · Dolores County, CO (85 mi) · Archuleta County, CO (85 mi) · Rio Arriba County (90 mi).