26,103 people (2024 Census estimate, +0.9% since 2020)
563 square miles of land · 46 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 McNairy County in the area they serve, reporting 36,604 people served in all (a system that crosses county lines counts its whole population).
| SELMER WATER SYSTEM groundwater · local government · TN0000615 | 20,648 served |
| ADAMSVILLE WATER SYSTEM groundwater · local government · TN0000002 | 9,985 served |
| MICHIE WATER DEPT groundwater · local government · TN0000454 | 2,825 served |
| EASTVIEW UTILITY DISTRICT buys groundwater · local government · TN0000570 | 2,206 served |
| BETHEL SPRINGS WATER SYSTEM groundwater · local government · TN0000050 | 940 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 90 people were held in McNairy County's jail, in Vera's latest figure (2024), or 554 per 100,000 residents ages 15–64. In 2019 it was about 89.
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 McNairy County. School taxes are usually the largest part of a property tax bill.
Spent $47.8 million — $43.9 million to run schools, about $11,456 per student, plus $2.7 million on buildings and equipment. Money in: $9.7 million local (mostly property tax), $29.2 million state, $10.1 million federal. Long-term debt: $29.7 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 McNairy County about $14.6 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.
218 bridges in McNairy County: 88 in good condition, 121 fair, and 9 poor (4.1%). “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 22 over SAM BISHOP DITCH · built 1958 | 5,579 vehicles a day |
| FAP 22 over WHITE OAK CREEK · built 1958 | 5,579 vehicles a day |
| FAP 22 over N. FORK WHITE OAK CREEK · built 1958 | 5,579 vehicles a day |
| FAS 224 over WHITE OAK CREEK · built 1963 | 512 vehicles a day |
| NFA A148 over CYPRESS CREEK · built 1965 | 460 vehicles a day |
| NFA A164 over LICK CREEK · built 1975 | 165 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1.8 million of work in McNairy County in fiscal 2025, about $68 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 McNairy 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 McNairy County built: brayden.ozark@gmail.com.
More of Tennessee: the state government and every county in Tennessee.
Nearby counties: Chester County (17 mi) · Alcorn County, MS (20 mi) · Hardin County (21 mi) · Hardeman County (24 mi) · Madison County (33 mi) · Henderson County (34 mi).