36,403 people (2024 Census estimate, −0.8% since 2020)
512 square miles of land · 71 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 Dyer County in the area they serve, reporting 36,378 people served in all (a system that crosses county lines counts its whole population).
| DYERSBURG WATER DEPT groundwater · local government · TN0000211 | 19,970 served |
| NEWBERN WATER DEPT groundwater · local government · TN0000496 | 8,098 served |
| NORTHWEST DYERSBURG U.D. groundwater · local government · TN0000518 | 3,996 served |
| DYERSBURG SUBURBAN C.U.D. groundwater · local government · TN0000212 | 3,538 served |
| TRIMBLE WATER SYSTEM groundwater · private · TN0000711 | 776 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 230 people were held in Dyer County's jail, in Vera's latest figure (2024), or 1,012 per 100,000 residents ages 15–64. In 2019 it was about 251.
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 Dyer County. School taxes are usually the largest part of a property tax bill.
Spent $50.6 million — $42.3 million to run schools, about $11,618 per student, plus $6.8 million on buildings and equipment. Money in: $15.6 million local (mostly property tax), $25.2 million state, $9.6 million federal. Long-term debt: $16.6 million.
Spent $36 million — $33.1 million to run schools, about $12,650 per student, plus $2.4 million on buildings and equipment. Money in: $13.1 million local (mostly property tax), $15.7 million state, $10.5 million federal. Long-term debt: $10.4 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 Dyer County about $47.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
232 bridges in Dyer County: 69 in good condition, 144 fair, and 19 poor (8.2%). “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 20 over SR 20 WB / ICG RAILROAD · built 1985 | 11,746 vehicles a day |
| FAU 211 over N. FORK FORKED DEER RIVE · built 1933 | 5,963 vehicles a day |
| FAU 211 over BRANCH · built 1922 | 5,117 vehicles a day |
| FAP 78 over DRAINAGE CANAL · built 1926 | 3,574 vehicles a day |
| FAS 182 over LEWIS CREEK · built 1960 | 1,462 vehicles a day |
| NFA A251 over BRANCH · built 1983 | 920 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $16.1 million of work in Dyer County in fiscal 2025, about $436 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 Dyer 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 Dyer County built: brayden.ozark@gmail.com.
More of Tennessee: the state government and every county in Tennessee.
Nearby counties: Lake County (20 mi) · Crockett County (22 mi) · Lauderdale County (24 mi) · Pemiscot County, MO (24 mi) · Obion County (25 mi) · Gibson County (26 mi).