35,737 people (2024 Census estimate, +4.4% since 2020)
576 square miles of land · 62 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.
8 active community water systems list Miami County in the area they serve, reporting 29,041 people served in all (a system that crosses county lines counts its whole population).
| MIAMI CO RWD 2 surface water · local government · KS2012101 | 10,311 served |
| PAOLA, CITY OF buys surface water · local government · KS2012103 | 5,786 served |
| LOUISBURG, CITY OF buys surface water · local government · KS2012106 | 4,994 served |
| OSAWATOMIE, CITY OF surface water · local government · KS2012105 | 4,280 served |
| MIAMI CO RWD 3 buys surface water · local government · KS2012104 | 2,435 served |
| MIAMI CO RWD 4 buys surface water · local government · KS2012108 | 1,018 served |
| FONTANA, CITY OF buys surface water · local government · KS2012107 | 216 served |
| MARAIS DES CYGNES PUBLIC UTILITY AUTH surface water · local government · KS2012109 | 1 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 Miami County's jail, in Vera's latest figure (2019), or 402 per 100,000 residents ages 15–64. In 2014 it was about 43.
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 $44.5 million — $40.7 million to run schools, about $22,415 per student, plus $2.5 million on buildings and equipment. Money in: $25.7 million local (mostly property tax), $18.6 million state, $5 million federal. Long-term debt: $10.2 million.
Spent $29.9 million — $20.3 million to run schools, about $11,240 per student, plus $8.7 million on buildings and equipment. Money in: $8.8 million local (mostly property tax), $15 million state, $1.7 million federal. Long-term debt: $24 million.
Spent $18.8 million — $17.1 million to run schools, about $16,089 per student, plus $896,000 on buildings and equipment. Money in: $6.3 million local (mostly property tax), $14.3 million state, $2.7 million federal. Long-term debt: $7.9 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 $17.9 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.
327 bridges in Miami County: 209 in good condition, 108 fair, and 10 poor (3.1%). “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.
| Woodland Road over TRIB. TO SWEETWATER CRK · built 2005 | 655 vehicles a day |
| 255th Street over STREAM · built 1965 | 102 vehicles a day |
| 399th ST over LA CYGNE LAKE · built 1962 | 95 vehicles a day |
| New Lancaster Rd over TRIB. TO MIDDLE CREEK · built 1920 | 94 vehicles a day |
| 239th Street over TRIB. TO ROCK CREEK · built 1915 | 48 vehicles a day |
| 267th Street over TRIB. TO TEN MILE CREEK · built 1920 | 48 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $547,826 of work in Miami County in fiscal 2025, about $16 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 Kansas 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 Kansas: the state government and every county in Kansas.
Nearby counties: Johnson County (22 mi) · Franklin County (24 mi) · Linn County (24 mi) · Cass County, MO (26 mi) · Douglas County (34 mi) · Bates County, MO (34 mi).