399,295 people (2024 Census estimate, +3.4% since 2020)
657 square miles of land · 608 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.
12 active community water systems list Allen County in the area they serve, reporting 308,737 people served in all (a system that crosses county lines counts its whole population).
| FORT WAYNE - 3 RIVERS FILTRATION PLANT surface water · local government · IN5202020 | 269,994 served |
| NEW HAVEN WATER DEPARTMENT buys surface water · local government · IN5202009 | 15,700 served |
| HUNTERTOWN WATER WORKS groundwater · local government · IN5202007 | 14,058 served |
| PIONEER WATER L.L.C. groundwater · private · IN5202034 | 2,076 served |
| MAYSVILLE REGION. WATER & SEWER DISTRICT buys surface water · local government · IN5202037 | 1,634 served |
| WOODBURN WATER WORKS groundwater · local government · IN5202024 | 1,609 served |
| MONROEVILLE WATER WORKS groundwater · local government · IN5202008 | 1,400 served |
| GRABILL WATER WORKS buys surface water · local government · IN5202006 | 1,163 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 718 people were held in Allen County's jail, in Vera's latest figure (2024), or 288 per 100,000 residents ages 15–64. In 2019 it was about 797.
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.
4 school districts have their office in Allen County. School taxes are usually the largest part of a property tax bill.
Spent $542.6 million — $416.9 million to run schools, about $14,571 per student, plus $114 million on buildings and equipment. Money in: $113.3 million local (mostly property tax), $280.1 million state, $134.1 million federal. Long-term debt: $231.6 million.
Spent $146 million — $123.5 million to run schools, about $12,242 per student, plus $18.3 million on buildings and equipment. Money in: $35.2 million local (mostly property tax), $94 million state, $22.8 million federal. Long-term debt: $98.6 million.
Spent $110.7 million — $89.3 million to run schools, about $10,914 per student, plus $17.4 million on buildings and equipment. Money in: $37.9 million local (mostly property tax), $69.7 million state, $5.6 million federal. Long-term debt: $95.4 million.
Spent $101.4 million — $88.9 million to run schools, about $11,322 per student, plus $5.3 million on buildings and equipment. Money in: $38.1 million local (mostly property tax), $67.2 million state, $4 million federal. Long-term debt: $166.7 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 Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Allen County about $97.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
615 bridges in Allen County: 257 in good condition, 313 fair, and 45 poor (7.3%). “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.
| BLUFFTON RD over ST MARYS RIVER · built 1986 | 23,300 vehicles a day |
| CLINTON ST over BECKETT RUN · built 1948 | 20,000 vehicles a day |
| TILLMAN RD over HIGHLAND DRAIN 4 · built 1966 | 12,125 vehicles a day |
| EWING ST NB over ST MARYS RIVER · built 1981 | 10,100 vehicles a day |
| COLUMBIA ST over DELTA LAKE · built 1939 | 10,025 vehicles a day |
| PAULDING RD over TRIER DRAIN · built 1966 | 9,025 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $204.7 million of work in Allen County in fiscal 2025, about $531 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 Indiana 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 Allen 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 Allen County built: brayden.ozark@gmail.com.
More of Indiana: the state government and every county in Indiana.
Nearby counties: DeKalb County (21 mi) · Whitley County (23 mi) · Adams County (25 mi) · Paulding County, OH (26 mi) · Wells County (26 mi) · Huntington County (28 mi).