15,921 people (2024 Census estimate, +10.5% since 2020)
598 square miles of land · 27 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.
5 active community water systems list Jefferson County in the area they serve, reporting 8,752 people served in all (a system that crosses county lines counts its whole population).
| MONTICELLO, CITY OF groundwater · local government · FL1330478 | 4,502 served |
| JEFFERSON COMMUNITIES WATER SYSTEM groundwater · private · FL1330748 | 2,649 served |
| JEFFERSON CORRECTIONAL INSTITUTION groundwater · state · FL2331185 | 1,300 served |
| LAMONT WATER SYSTEM groundwater · public/private · FL1330754 | 222 served |
| MONTICELLO CARE CENTER groundwater · private · FL1330374 | 79 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 55 people were held in Jefferson County's jail, in Vera's latest figure (2026). In 2021 it was about 61.
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.
1 school district has its office in Jefferson County. School taxes are usually the largest part of a property tax bill.
Spent $13.1 million — $12.6 million to run schools, about $17,304 per student, plus $352,000 on buildings and equipment. Money in: $5.3 million local (mostly property tax), $6 million state, $5 million federal.
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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Jefferson County about $7.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
70 bridges in Jefferson County: 21 in good condition, 48 fair, and 1 poor (1.4%). “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.
| CR257 over Aucilla River · built 1984 | 400 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $-3,560,713 of work in Jefferson County in fiscal 2025, about $-245 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. Last day to register to vote: 2026-10-05. Vote-by-mail request due by 5 pm: 2026-10-22. Early voting — the statewide minimum: 2026-10-24 to 2026-10-31. Election Day — and mail ballots must arrive: 2026-11-03.
Source: Florida Division of Elections — election dates · WPTV, 2026 deadlines · Florida Division of Elections — early voting
The budget, property tax rates, audits, local officials and offices for Jefferson 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 Jefferson County built: brayden.ozark@gmail.com.
More of Florida: the state government and every county in Florida.
Nearby counties: Leon County (22 mi) · Madison County (27 mi) · Thomas County, GA (32 mi) · Wakulla County (33 mi) · Taylor County (34 mi) · Brooks County, GA (36 mi).