30,404 people (2024 Census estimate, +0.6% since 2020)
471 square miles of land · 65 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.
15 active community water systems list Ottawa County in the area they serve, reporting 24,007 people served in all (a system that crosses county lines counts its whole population).
| MIAMI groundwater · local government · OK2005813 | 13,704 served |
| COMMERCE groundwater · local government · OK2005810 | 2,645 served |
| AFTON PWA surface water · local government · OK1021696 | 1,428 served |
| FAIRLAND PUBLIC WORKS AUTHORITY groundwater · local government · OK2005809 | 1,025 served |
| QUAPAW groundwater · local government · OK2005811 | 906 served |
| OTTAWA CO RWD #5 groundwater · local government · OK2005840 | 750 served |
| OTTAWA CO RWD # 2 groundwater · local government · OK2005804 | 700 served |
| OTTAWA CO RWD # 4 groundwater · local government · OK2005801 | 652 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 87 people were held in Ottawa County's jail, in Vera's latest figure (2024), or 472 per 100,000 residents ages 15–64. In 2019 it was about 104.
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.
7 school districts have their office in Ottawa County. School taxes are usually the largest part of a property tax bill.
Spent $29.1 million — $25 million to run schools, about $11,353 per student, plus $4.1 million on buildings and equipment. Money in: $6.9 million local (mostly property tax), $14.3 million state, $5.4 million federal. Long-term debt: $4 million.
Spent $11.1 million — $9.6 million to run schools, about $10,822 per student, plus $1.5 million on buildings and equipment. Money in: $2.5 million local (mostly property tax), $6.3 million state, $2.6 million federal. Long-term debt: $1.1 million.
Spent $8.9 million — $8.4 million to run schools, about $11,339 per student, plus $378,000 on buildings and equipment. Money in: $2 million local (mostly property tax), $5 million state, $2.6 million federal. Long-term debt: $380,000.
Spent $7.4 million — $6.7 million to run schools, about $11,086 per student, plus $669,000 on buildings and equipment. Money in: $2 million local (mostly property tax), $3.5 million state, $1.8 million federal. Long-term debt: $650,000.
Spent $7.3 million — $7 million to run schools, about $12,228 per student, plus $270,000 on buildings and equipment. Money in: $2 million local (mostly property tax), $4.2 million state, $1.2 million federal. Long-term debt: $1.2 million.
Spent $6.3 million — $6.1 million to run schools, about $12,761 per student, plus $184,000 on buildings and equipment. Money in: $1.6 million local (mostly property tax), $3.2 million state, $1.6 million federal.
Spent $1.3 million — $1.2 million to run schools, about $11,467 per student, plus $15,000 on buildings and equipment. Money in: $539,000 local (mostly property tax), $503,000 state, $440,000 federal. Long-term debt: $210,000.
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 Ottawa County about $23.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
271 bridges in Ottawa County: 104 in good condition, 108 fair, and 59 poor (21.8%). “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.
| E0080 over CREEK · built 1950 | 1,000 vehicles a day |
| IRR N4550 over CREEK · built 1965 | 650 vehicles a day |
| IRR E0060 over TAR CREEK · built 1996 | 500 vehicles a day |
| IRR E0040 over TAR CREEK · built 2010 | 500 vehicles a day |
| IRR 5806C over CREEK · built 1939 | 400 vehicles a day |
| IRR E0165 over SYCAMORE CREEK · built 1975 | 400 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $49.2 million of work in Ottawa County in fiscal 2025, about $1,624 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 Ottawa 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 Ottawa County built: brayden.ozark@gmail.com.
More of Oklahoma: the state government and every county in Oklahoma.
Nearby counties: Craig County (23 mi) · Cherokee County, KS (23 mi) · Newton County, MO (26 mi) · McDonald County, MO (29 mi) · Delaware County (31 mi) · Jasper County, MO (36 mi).