53,893 people (2024 Census estimate, −2.7% since 2020)
2,221 square miles of land · 24 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.
49 active community water systems list Tuolumne County in the area they serve, reporting 57,582 people served in all (a system that crosses county lines counts its whole population).
| TUD - UPPER BASIN WATER SYSTEM surface water · local government · CA5510012 | 13,331 served |
| TUD - SONORA/JAMESTOWN WATER SYSTEM surface water · local government · CA5510001 | 11,113 served |
| TUD - COLUMBIA WATER SYSTEM surface water · local government · CA5510013 | 5,482 served |
| CDCR - SIERRA CONSERVATION CENTER surface water · state · CA5510851 | 3,571 served |
| GROVELAND COMMUNITY SERV DIST surface water · private · CA5510009 | 3,400 served |
| TWAIN HARTE COMMUNITY SERVICES DISTRICT surface water · local government · CA5510005 | 2,378 served |
| TUD - TUOLUMNE WATER SYSTEM surface water · local government · CA5510003 | 1,798 served |
| TUD - PONDEROSA surface water · local government · CA5510002 | 1,781 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 130 people were held in Tuolumne County's jail, in Vera's latest figure (2025). In 2020 it was about 112.
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.
12 school districts have their office in Tuolumne County. School taxes are usually the largest part of a property tax bill.
Spent $17.4 million — $16.8 million to run schools, about $15,423 per student, plus $292,000 on buildings and equipment. Money in: $14.7 million local (mostly property tax), $5.6 million state, $1.4 million federal. Long-term debt: $21.7 million.
Spent $11.6 million — $10.4 million to run schools, about $14,377 per student, plus $684,000 on buildings and equipment. Money in: $4.2 million local (mostly property tax), $13.1 million state, $2.4 million federal. Long-term debt: $10.1 million.
Spent $12.3 million — $10.7 million to run schools, about $16,090 per student, plus $54,000 on buildings and equipment. Money in: $8.3 million local (mostly property tax), $9.1 million state, $539,000 federal. Long-term debt: $16.3 million.
Spent $7.3 million — $6.8 million to run schools, about $14,058 per student, plus $322,000 on buildings and equipment. Money in: $2.6 million local (mostly property tax), $4.5 million state, $639,000 federal. Long-term debt: $882,000.
Spent $6.2 million — $5.9 million to run schools, about $13,481 per student, plus $42,000 on buildings and equipment. Money in: $4.5 million local (mostly property tax), $3 million state, $616,000 federal.
Spent $6.9 million — $6.6 million to run schools, about $14,989 per student, plus $154,000 on buildings and equipment. Money in: $2.5 million local (mostly property tax), $4.6 million state, $854,000 federal. Long-term debt: $5.1 million.
Spent $6.3 million — $6 million to run schools, about $14,495 per student, plus $94,000 on buildings and equipment. Money in: $1.8 million local (mostly property tax), $4.5 million state, $1 million federal.
Spent $7 million — $6.6 million to run schools, about $17,305 per student, plus $42,000 on buildings and equipment. Money in: $3.1 million local (mostly property tax), $4.2 million state, $1.4 million federal.
And 4 more.
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 Tuolumne County about $50.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
125 bridges in Tuolumne County: 45 in good condition, 72 fair, and 8 poor (6.4%). “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.
| MONO WAY over SULLIVAN CREEK · built 1991 | 25,060 vehicles a day |
| SR 108 over MONO WAY · built 2004 | 17,450 vehicles a day |
| STATE ROUTE 120 over CHINESE CREEK · built 1914 | 2,800 vehicles a day |
| PARROTTS FERRY RD over NEW MELONES RESERVOIR · built 1978 | 2,500 vehicles a day |
| WINDING ROAD over UPPER HUNTER CREEK · built 1969 | 50 vehicles a day |
| WINDING ROAD over STANISLAUS RIVER · built 1926 | 50 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $10.4 million of work in Tuolumne County in fiscal 2025, about $187 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.
General election: Tuesday, November 3, 2026. Ballots mailed; drop boxes open: 2026-10-05. Last day to register to vote: 2026-10-19. Early in-person voting: 2026-10-24 to 2026-11-03. Election Day: 2026-11-03. Last day for mailed ballots to arrive: 2026-11-10.
Source: California Secretary of State — Nov. 3, 2026 key dates · California Official Voter Information Guide — dates to remember · California Secretary of State — make a plan to vote
The budget, property tax rates, audits, local officials and offices for Tuolumne 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 Tuolumne County built: brayden.ozark@gmail.com.
More of California: the state government and every county in California.
Nearby counties: Mariposa County (31 mi) · Calaveras County (34 mi) · Alpine County (42 mi) · Amador County (47 mi) · Madera County (57 mi) · Mono County (60 mi).