139,642 people (2024 Census estimate, +4.8% since 2020)
327 square miles of land · 428 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.
2 active community water systems list Washington County in the area they serve, reporting 138,126 people served in all (a system that crosses county lines counts its whole population).
| JOHNSON CITY WATER DEPT surface water · local government · TN0000331 | 105,057 served |
| JONESBOROUGH WATER DEPT surface water · local government · TN0000338 | 33,069 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 631 people were held in Washington County's jail, in Vera's latest figure (2024), or 693 per 100,000 residents ages 15–64. In 2019 it was about 755.
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.
2 school districts have their office in Washington County. School taxes are usually the largest part of a property tax bill.
Spent $104.6 million — $93.6 million to run schools, about $11,306 per student, plus $6.7 million on buildings and equipment. Money in: $46.5 million local (mostly property tax), $41 million state, $16.7 million federal. Long-term debt: $100.6 million.
Spent $108.9 million — $97.8 million to run schools, about $12,230 per student, plus $7.7 million on buildings and equipment. Money in: $56.9 million local (mostly property tax), $37.9 million state, $18.5 million federal. Long-term debt: $46.8 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 Washington County about $22.6 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.
283 bridges in Washington County: 140 in good condition, 134 fair, and 9 poor (3.2%). “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 244038W over CSX RAILROAD · built 1931 | 27,789 vehicles a day |
| FAU 3960 over CSX RAILROAD · built 1988 | 7,462 vehicles a day |
| FAP 81 over NOLICHUCKY RIVER · built 1959 | 4,903 vehicles a day |
| NFA 2569 (SA 9004) over NOLICHUCKY RIVER · built 1958 | 776 vehicles a day |
| NFA B435 244046N over CSX RAILROAD · built 1970 | 700 vehicles a day |
| NFA B181 over LITTLE CHEROKEE CREEK · built 1930 | 610 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $103.5 million of work in Washington County in fiscal 2025, about $778 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 Washington 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 Washington County built: brayden.ozark@gmail.com.
More of Tennessee: the state government and every county in Tennessee.
Nearby counties: Unicoi County (14 mi) · Sullivan County (18 mi) · Carter County (21 mi) · Greene County (21 mi) · Hawkins County (27 mi) · Mitchell County, NC (27 mi).