16,147 people (2024 Census estimate, +5.3% since 2020)
371 square miles of land · 43 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.
8 active community water systems list Marshall County in the area they serve, reporting 25,727 people served in all (a system that crosses county lines counts its whole population).
| MARSHALL COUNTY RURAL WATER DISTRICT #2 surface water · local government · OK1010848 | 17,587 served |
| MADILL surface water · local government · OK1010820 | 3,410 served |
| KINGSTON PWA groundwater · local government · OK2004501 | 1,600 served |
| OAKLAND PWA buys surface water · local government · OK3004513 | 1,050 served |
| OAKVIEW WATER CORP groundwater · local government · OK2004506 | 925 served |
| CARDINAL HILL SUBDIVISION groundwater · private · OK2004539 | 475 served |
| MARSHALL COUNTY RWD #1 buys surface water · private · OK3004521 | 468 served |
| TEXOMA HILLS buys surface water · private · OK2004538 | 212 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 18 people were held in Marshall County's jail, in Vera's latest figure (2024), or 191 per 100,000 residents ages 15–64. In 2019 it was about 65.
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 Marshall County. School taxes are usually the largest part of a property tax bill.
Spent $23.5 million — $19.6 million to run schools, about $11,161 per student, plus $3.8 million on buildings and equipment. Money in: $7.3 million local (mostly property tax), $10.9 million state, $4.8 million federal. Long-term debt: $4.3 million.
Spent $20.9 million — $16.3 million to run schools, about $12,827 per student, plus $4.5 million on buildings and equipment. Money in: $7 million local (mostly property tax), $8.9 million state, $5.2 million federal. Long-term debt: $2.9 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 $9.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
79 bridges in Marshall County: 41 in good condition, 29 fair, and 9 poor (11.4%). “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.
| N3580 MOORE RD over ROCK CREEK · built 1936 | 100 vehicles a day |
| N3560 over ROOSTER CREEK · built 1940 | 100 vehicles a day |
| D3538 over LITTLE GLASSES CREEK · built 1940 | 100 vehicles a day |
| FAS 4814 over CREEK · built 1986 | 100 vehicles a day |
| 4820C MCMILLAN RD over LITTLE HAUANI CREEK · built 1988 | 100 vehicles a day |
| N3057 3RD ST. over WHISKEY CREEK · built 1937 | 100 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $5.3 million of work in Marshall County in fiscal 2025, about $349 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 Oklahoma 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 Oklahoma: the state government and every county in Oklahoma.
Nearby counties: Johnston County (21 mi) · Love County (28 mi) · Grayson County, TX (28 mi) · Bryan County (29 mi) · Carter County (33 mi) · Murray County (36 mi).