14,626 people (2024 Census estimate, +0.4% since 2020)
697 square miles of land · 21 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.
11 active community water systems list Harrison County in the area they serve, reporting 8,192 people served in all (a system that crosses county lines counts its whole population).
| MISSOURI VALLEY WATER SUPPLY groundwater · local government · IA4344088 | 2,678 served |
| WOODBINE WATER DEPARTMENT groundwater · local government · IA4388034 | 1,625 served |
| LOGAN WATER SUPPLY groundwater · local government · IA4337092 | 1,397 served |
| DUNLAP WATER SUPPLY groundwater · local government · IA4316087 | 1,035 served |
| MONDAMIN WATER SUPPLY groundwater · local government · IA4349094 | 339 served |
| MODALE WATER SUPPLY groundwater · local government · IA4347093 | 280 served |
| PISGAH WATER SUPPLY groundwater · local government · IA4364044 | 245 served |
| SUNNYSIDE VILLAGE MHP LLC groundwater · private · IA4300600 | 190 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 11 people were held in Harrison County's jail, in Vera's latest figure (2019), or 122 per 100,000 residents ages 15–64. In 2014 it was about 10.
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.
5 school districts have their office in Harrison County. School taxes are usually the largest part of a property tax bill.
Spent $12.1 million — $10.2 million to run schools, about $13,434 per student, plus $646,000 on buildings and equipment. Money in: $5.9 million local (mostly property tax), $6.6 million state, $1.2 million federal. Long-term debt: $8.8 million.
Spent $9.6 million — $7.8 million to run schools, about $10,742 per student, plus $915,000 on buildings and equipment. Money in: $5 million local (mostly property tax), $4.9 million state, $735,000 federal. Long-term debt: $8.9 million.
Spent $14.5 million — $7.1 million to run schools, about $13,300 per student, plus $6.7 million on buildings and equipment. Money in: $5.5 million local (mostly property tax), $4.5 million state, $808,000 federal. Long-term debt: $2.1 million.
Spent $10.1 million — $5.6 million to run schools, about $13,252 per student, plus $3.9 million on buildings and equipment. Money in: $4.4 million local (mostly property tax), $3 million state, $768,000 federal.
Spent $6.6 million — $5.1 million to run schools, about $16,515 per student, plus $588,000 on buildings and equipment. Money in: $3.4 million local (mostly property tax), $2.7 million state, $433,000 federal. Long-term debt: $1 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 Harrison County about $9.8 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.
222 bridges in Harrison County: 61 in good condition, 120 fair, and 41 poor (18.5%). “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.
| FM EASTON TRAIL over ALLEN CREEK · built 1969 | 335 vehicles a day |
| FM LAREDO AVE over ALLEN CREEK · built 1942 | 139 vehicles a day |
| L23 LAREDO AVE over STEER CREEK · built 1942 | 139 vehicles a day |
| 8TH STREET over BOYER RIVER · built 1900 | 123 vehicles a day |
| FM - 335TH ST over MOSQUITO CREEK · built 1920 | 120 vehicles a day |
| FM TABOR AVE over SMALL STREAM · built 1956 | 110 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $11 million of work in Harrison County in fiscal 2025, about $755 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 Iowa 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 Harrison 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 Harrison County built: brayden.ozark@gmail.com.
More of Iowa: the state government and every county in Iowa.
Nearby counties: Washington County, NE (23 mi) · Monona County (26 mi) · Shelby County (27 mi) · Pottawattamie County (28 mi) · Burt County, NE (29 mi) · Douglas County, NE (32 mi).