231,762 people (2024 Census estimate, +0.6% since 2020)
717 square miles of land · 323 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.
40 active community water systems list Linn County in the area they serve, reporting 217,144 people served in all (a system that crosses county lines counts its whole population).
| CEDAR RAPIDS WATER DEPARTMENT groundwater (surface-influenced) · local government · IA5715093 | 142,364 served |
| MARION MUNICIPAL WATER DEPT groundwater · local government · IA5751035 | 41,623 served |
| HIAWATHA WATER DEPT groundwater · local government · IA5735045 | 7,183 served |
| MOUNT VERNON WATER SUPPLY groundwater · local government · IA5758021 | 4,527 served |
| FAIRFAX WATER SUPPLY groundwater · local government · IA5731032 | 2,828 served |
| CENTER POINT WATER SUPPLY groundwater · local government · IA5718006 | 2,579 served |
| ELY WATER SUPPLY groundwater · local government · IA5728018 | 2,328 served |
| LISBON WATER SUPPLY groundwater · local government · IA5748086 | 2,233 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 375 people were held in Linn County's jail, in Vera's latest figure (2023), or 256 per 100,000 residents ages 15–64. In 2018 it was about 365.
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.
10 school districts have their office in Linn County. School taxes are usually the largest part of a property tax bill.
Spent $270.5 million — $223.6 million to run schools, about $14,365 per student, plus $28.9 million on buildings and equipment. Money in: $115.5 million local (mostly property tax), $144.6 million state, $35.9 million federal. Long-term debt: $102.7 million.
Spent $119.9 million — $98.7 million to run schools, about $12,833 per student, plus $9.2 million on buildings and equipment. Money in: $54.7 million local (mostly property tax), $66.8 million state, $6.9 million federal. Long-term debt: $110.3 million.
Spent $109.8 million — $74.6 million to run schools, about $12,990 per student, plus $26 million on buildings and equipment. Money in: $54.4 million local (mostly property tax), $43.6 million state, $6.7 million federal. Long-term debt: $155.5 million.
Spent $49.4 million — $30.2 million to run schools, about $13,528 per student, plus $15.8 million on buildings and equipment. Money in: $19.9 million local (mostly property tax), $18 million state, $4 million federal. Long-term debt: $44.9 million.
Spent $23 million — $17.8 million to run schools, about $12,721 per student, plus $3.7 million on buildings and equipment. Money in: $11.1 million local (mostly property tax), $9.8 million state, $1.2 million federal. Long-term debt: $17 million.
Spent $15.2 million — $8.9 million to run schools, about $11,010 per student, plus $5.3 million on buildings and equipment. Money in: $7 million local (mostly property tax), $4.3 million state, $452,000 federal. Long-term debt: $16.4 million.
Spent $12.4 million — $8.7 million to run schools, about $12,102 per student, plus $635,000 on buildings and equipment. Money in: $7 million local (mostly property tax), $6 million state, $603,000 federal. Long-term debt: $10.5 million.
Spent $13.9 million — $6.4 million to run schools, about $11,950 per student, plus $6.2 million on buildings and equipment. Money in: $4.7 million local (mostly property tax), $4.5 million state, $418,000 federal. Long-term debt: $12.5 million.
And 2 more.
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 Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Linn County about $79.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
511 bridges in Linn County: 182 in good condition, 295 fair, and 34 poor (6.7%). “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.
| 8TH AVE over INDIAN CREEK · built 1988 | 10,789 vehicles a day |
| EDGEWOOD RD NE over CEDAR RIVER & RR · built 1969 | 10,268 vehicles a day |
| CENTER POINT RD over OVER CC RR · built 1968 | 9,703 vehicles a day |
| 8TH AVE over CEDAR RIVER · built 1938 | 9,382 vehicles a day |
| COVINGTON RD over SILVER CREEK · built 1955 | 5,696 vehicles a day |
| COVINGTON RD over LONE TREE CREEK · built 1925 | 5,200 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $125.2 million of work in Linn County in fiscal 2025, about $544 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 Linn 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 Linn County built: brayden.ozark@gmail.com.
More of Iowa: the state government and every county in Iowa.
Nearby counties: Benton County (24 mi) · Jones County (25 mi) · Johnson County (28 mi) · Delaware County (30 mi) · Buchanan County (30 mi) · Cedar County (32 mi).