35,613 people (2024 Census estimate, −0.8% since 2020)
374 square miles of land · 95 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 Miami County in the area they serve, reporting 17,349 people served in all (a system that crosses county lines counts its whole population).
| PERU WATER DEPARTMENT groundwater · local government · IN5252016 | 11,417 served |
| PERU UTILITIES/GRISSOM groundwater · state · IN5252011 | 2,500 served |
| CONVERSE WATER WORKS groundwater · local government · IN5252006 | 1,265 served |
| BUNKER HILL WATER WORKS groundwater · local government · IN5252003 | 900 served |
| DEER CREEK ESTATES HOME WATER ASSOC. groundwater · private · IN5252007 | 265 served |
| MAPLE LAWN VILLAGE groundwater · private · IN5252013 | 250 served |
| WOODLAND HILLS MOBILE HOME PARK #2 groundwater · private · IN5252017 | 168 served |
| CEDAR CREEK MOBILE HOME PARK groundwater · private · IN5252022 | 150 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 88 people were held in Miami County's jail, in Vera's latest figure (2024), or 383 per 100,000 residents ages 15–64. In 2019 it was about 166.
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.
3 school districts have their office in Miami County. School taxes are usually the largest part of a property tax bill.
Spent $28 million — $24.7 million to run schools, about $12,709 per student, plus $2.6 million on buildings and equipment. Money in: $7.1 million local (mostly property tax), $18.1 million state, $3.1 million federal. Long-term debt: $8.6 million.
Spent $26.9 million — $23.3 million to run schools, about $12,570 per student, plus $1.9 million on buildings and equipment. Money in: $5.1 million local (mostly property tax), $18.5 million state, $4.3 million federal. Long-term debt: $15.4 million.
Spent $12.7 million — $9.7 million to run schools, about $12,668 per student, plus $2.5 million on buildings and equipment. Money in: $3.8 million local (mostly property tax), $7.1 million state, $1.3 million federal. Long-term debt: $4.7 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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Miami County about $15.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
171 bridges in Miami County: 62 in good condition, 97 fair, and 12 poor (7.0%). “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.
| CR 1050 EAST over BIG PIPE CREEK · built 1930 | 900 vehicles a day |
| CR 300 WEST over RIFE CREEK · built 1935 | 625 vehicles a day |
| WATER STREET over LITTLE PIPE CREEK · built 1930 | 300 vehicles a day |
| PARK DRIVE over SCHOOLMAN DITCH · built 1935 | 235 vehicles a day |
| CR 100 WEST over LITTLE WEESAU CREEK · built 1940 | 150 vehicles a day |
| CR 1400 NORTH over SQUIRREL CREEK · built 1945 | 125 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $5.6 million of work in Miami County in fiscal 2025, about $156 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 Miami 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 Miami County built: brayden.ozark@gmail.com.
More of Indiana: the state government and every county in Indiana.
Nearby counties: Wabash County (14 mi) · Cass County (16 mi) · Howard County (20 mi) · Fulton County (22 mi) · Grant County (27 mi) · Huntington County (30 mi).