7,071 people (2024 Census estimate, +1.4% since 2020)
564 square miles of land · 13 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.
7 active community water systems list Bon Homme County in the area they serve, reporting 18,401 people served in all (a system that crosses county lines counts its whole population).
| BY WATER DISTRICT surface water · local government · SD4600865 | 13,320 served |
| SPRINGFIELD surface water · local government · SD4600317 | 2,108 served |
| TYNDALL buys surface water · local government · SD4600337 | 1,012 served |
| SCOTLAND buys surface water · local government · SD4600290 | 785 served |
| AVON buys surface water · local government · SD4600031 | 590 served |
| TABOR buys surface water · local government · SD4600327 | 423 served |
| MAXWELL COLONY groundwater · private · SD4602023 | 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 4 people were held in Bon Homme County's jail, in Vera's latest figure (2023), or 90 per 100,000 residents ages 15–64. In 2018 it was about 4.
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 Bon Homme County. School taxes are usually the largest part of a property tax bill.
Spent $7.6 million — $7.2 million to run schools, about $12,156 per student, plus $436,000 on buildings and equipment. Money in: $4 million local (mostly property tax), $2.6 million state, $1.4 million federal. Long-term debt: $1.6 million.
Spent $4.5 million — $3.7 million to run schools, about $12,593 per student, plus $781,000 on buildings and equipment. Money in: $2.4 million local (mostly property tax), $1.3 million state, $1 million federal. Long-term debt: $695,000.
Spent $4.3 million — $3.5 million to run schools, about $15,781 per student, plus $716,000 on buildings and equipment. Money in: $1.7 million local (mostly property tax), $1.8 million state, $518,000 federal. Long-term debt: $250,000.
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 Bon Homme County about $7.2 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
126 bridges in Bon Homme County: 26 in good condition, 66 fair, and 34 poor (27.0%). “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.
| SD037 over MISSOURI RIVER · built 1996 | 830 vehicles a day |
| 42520 293RD STREET over CREEK · built 1939 | 138 vehicles a day |
| 30480 428TH AVENUE over BEAVER CREEK · built 1940 | 130 vehicles a day |
| 29210 412TH AVENUE over EMANUEL CREEK · built 1975 | 127 vehicles a day |
| 40510 308TH STREET over TRIB. TO CHOTEAU CREEK · built 1935 | 115 vehicles a day |
| 310TH STREET over TRIB TO SNATCH CK · built 1940 | 88 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1.8 million of work in Bon Homme County in fiscal 2025, about $252 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 South Dakota 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 Bon Homme 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 Bon Homme County built: brayden.ozark@gmail.com.
More of South Dakota: the state government and every county in South Dakota.
Nearby counties: Knox County, NE (24 mi) · Yankton County (25 mi) · Hutchinson County (25 mi) · Douglas County (37 mi) · Charles Mix County (39 mi) · Cedar County, NE (41 mi).