386,256 people (2024 Census estimate, +5.0% since 2020)
542 square miles of land · 712 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.
8 active community water systems list Hamilton County in the area they serve, reporting 409,735 people served in all (a system that crosses county lines counts its whole population).
| TENNESSEE AMERICAN WATER surface water · private · TN0000107 | 207,046 served |
| HIXSON UTILITY DISTRICT groundwater · local government · TN0000303 | 68,306 served |
| EASTSIDE UTILITY DISTRICT surface water · local government · TN0000219 | 59,612 served |
| SAVANNAH VALLEY U.D. groundwater (surface-influenced) · local government · TN0000613 | 30,571 served |
| NORTHWEST UTILITY DISTRICT surface water · local government · TN0000169 | 20,710 served |
| WALDEN'S RIDGE U.D. buys surface water · local government · TN0000635 | 9,265 served |
| SIGNAL MOUNTAIN WATER SYSTEM buys surface water · local government · TN0000634 | 7,761 served |
| UNION FORK-BAKEWELL U.D. groundwater · local government · TN0000037 | 6,464 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 0 people were held in Hamilton County's jail, in Vera's latest figure (2024). In 2019 it was about 2,470.
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 Hamilton County. School taxes are usually the largest part of a property tax bill.
Spent $712.9 million — $678.7 million to run schools, about $14,785 per student, plus $18.9 million on buildings and equipment. Money in: $390.2 million local (mostly property tax), $203 million state, $126.1 million federal. Long-term debt: $196.9 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 Hamilton County about $140.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
464 bridges in Hamilton County: 198 in good condition, 238 fair, and 28 poor (6.0%). “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.
| I24 EBL & WBL over BRANCH · built 1960 | 115,412 vehicles a day |
| I75 over BRANCH · built 1959 | 110,093 vehicles a day |
| I24 over SOU RWY (ABANDONED) · built 1963 | 98,487 vehicles a day |
| I24 EBL over MISSIONARY RIDGE · built 1965 | 94,104 vehicles a day |
| I24 WBL over MISSIONARY RIDGE · built 1964 | 94,104 vehicles a day |
| I24 over BROWNS FERRY (FAU 3622) · built 1964 | 69,132 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $188.7 million of work in Hamilton County in fiscal 2025, about $515 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 Hamilton 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 Hamilton County built: brayden.ozark@gmail.com.
More of Tennessee: the state government and every county in Tennessee.
Nearby counties: Catoosa County, GA (19 mi) · Sequatchie County (19 mi) · Bradley County (19 mi) · Marion County (23 mi) · Dade County, GA (27 mi) · Whitfield County, GA (28 mi).