9,078 people (2024 Census estimate, +4.6% since 2020)
214 square miles of land · 42 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.
4 active community water systems list Lyon County in the area they serve, reporting 12,930 people served in all (a system that crosses county lines counts its whole population).
| LYON COUNTY WATER DISTRICT buys surface water · local government · KY0720933 | 6,744 served |
| EDDYVILLE WATER DEPARTMENT surface water · local government · KY0720113 | 3,843 served |
| KENTUCKY STATE PENITENTIARY surface water · state · KY0720552 | 1,200 served |
| KUTTAWA WATER DEPARTMENT surface water · local government · KY0720227 | 1,143 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 10 people were held in Lyon County's jail, in Vera's latest figure (2021), or 194 per 100,000 residents ages 15–64. In 2016 it was about 17.
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 Lyon County. School taxes are usually the largest part of a property tax bill.
Spent $14.5 million — $12.7 million to run schools, about $12,723 per student, plus $1.4 million on buildings and equipment. Money in: $6.1 million local (mostly property tax), $6 million state, $2.2 million federal. Long-term debt: $4.8 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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Lyon County about $7 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
79 bridges in Lyon County: 11 in good condition, 65 fair, and 3 poor (3.8%). “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.
| KY-295 over LIVINGSTON CREEK · built 1938 | 693 vehicles a day |
| KY-819 over PANTHER CREEK · built 1974 | 136 vehicles a day |
| LBL ROAD 114 over PISGAH CREEK · built 1933 | 80 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $48.3 million of work in Lyon County in fiscal 2025, about $5,559 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.
Registration deadlines, early voting and polling places for Kentucky are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for Lyon 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 Lyon County built: brayden.ozark@gmail.com.
More of Kentucky: the state government and every county in Kentucky.
Nearby counties: Caldwell County (15 mi) · Marshall County (17 mi) · Trigg County (19 mi) · Livingston County (20 mi) · Crittenden County (23 mi) · Calloway County (30 mi).