31,734 people (2024 Census estimate, +0.1% since 2020)
302 square miles of land · 105 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 Marshall County in the area they serve, reporting 37,426 people served in all (a system that crosses county lines counts its whole population).
| NORTH MARSHALL WATER DISTRICT #1 groundwater · local government · KY0790319 | 16,276 served |
| BENTON WATER & SEWER groundwater · local government · KY0790029 | 7,981 served |
| JONATHAN CREEK WATER DISTRICT groundwater · local government · KY0790216 | 7,182 served |
| CALVERT CITY MUNICIPAL WATER DEPARTMENT groundwater · local government · KY0790056 | 4,381 served |
| HARDIN WATER DEPARTMENT buys groundwater · local government · KY0790173 | 1,606 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 101 people were held in Marshall County's jail, in Vera's latest figure (2026). In 2021 it was about 175.
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 Marshall County. School taxes are usually the largest part of a property tax bill.
Spent $72.6 million — $65.4 million to run schools, about $14,559 per student, plus $4.6 million on buildings and equipment. Money in: $27.5 million local (mostly property tax), $45.1 million state, $10.8 million federal. Long-term debt: $48.5 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 Marshall County about $22.2 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
207 bridges in Marshall County: 83 in good condition, 114 fair, and 10 poor (4.8%). “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-402 over EAST FORK CLARKS RIVER · built 1933 | 2,149 vehicles a day |
| KY-1824 over South Fork Watch Creek · built 1930 | 1,942 vehicles a day |
| KY-58 over BRANCH OF CLARKS RIVER · built 1932 | 1,278 vehicles a day |
| KY-58 over WEST FORK CLARKS RIVER · built 1932 | 1,278 vehicles a day |
| KY-2595 over CYPRESS CREEK · built 1978 | 434 vehicles a day |
| KY-795 over CHESTNUT CREEK · built 1969 | 355 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $76 million of work in Marshall County in fiscal 2025, about $2,399 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 Marshall 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 Marshall County built: brayden.ozark@gmail.com.
More of Kentucky: the state government and every county in Kentucky.
Nearby counties: Lyon County (17 mi) · Calloway County (18 mi) · Graves County (21 mi) · Livingston County (23 mi) · McCracken County (24 mi) · Trigg County (27 mi).