59,217 people (2024 Census estimate, +7.8% since 2020)
275 square miles of land · 215 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 57,241 people served in all (a system that crosses county lines counts its whole population).
| SHADY GROVE UTILITY DISTRICT buys surface water · local government · TN0000626 | 27,672 served |
| DANDRIDGE WATER MGMT FACILITY buys surface water · local government · TN0000170 | 9,931 served |
| JEFFERSON CITY W&S COMM surface water · local government · TN0000328 | 9,764 served |
| NEW MARKET UTILITY DISTRICT buys surface water · local government · TN0000499 | 5,703 served |
| WHITE PINE WATER SYSTEM buys surface water · local government · TN0000746 | 4,171 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 167 people were held in Jefferson County's jail, in Vera's latest figure (2024), or 453 per 100,000 residents ages 15–64. In 2019 it was about 274.
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 $91.1 million — $74.5 million to run schools, about $10,648 per student, plus $14.3 million on buildings and equipment. Money in: $26.8 million local (mostly property tax), $44.1 million state, $21.6 million federal. Long-term debt: $42.2 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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Jefferson County about $12.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
123 bridges in Jefferson County: 18 in good condition, 90 fair, and 15 poor (12.2%). “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.
| FAP 34 731386T over SR 34 LF LN / SOU RR · built 1953 | 18,750 vehicles a day |
| FAS 9 over RIMMER CREEK · built 1934 | 7,782 vehicles a day |
| FAS 9 over KOONTZ CREEK · built 1930 | 7,782 vehicles a day |
| FAS 9 over DUMPLIN CREEK · built 1930 | 3,293 vehicles a day |
| FAP 92 over MUDDY CREEK · built 1946 | 1,648 vehicles a day |
| NFA 1430 over LONG CREEK · built 1965 | 1,066 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $22 million of work in Jefferson County in fiscal 2025, about $402 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. Early voting: 2026-10-14 to 2026-10-29. Mail ballot request deadline: 2026-10-24. Election Day: 2026-11-03.
Source: Tennessee Secretary of State: elections calendar · Tennessee Secretary of State: registration deadline FAQ · Tennessee Secretary of State: GoVoteTN
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 Tennessee: the state government and every county in Tennessee.
Nearby counties: Hamblen County (15 mi) · Grainger County (16 mi) · Sevier County (19 mi) · Cocke County (20 mi) · Union County (27 mi) · Knox County (28 mi).