874 people (2024 Census estimate, −5.3% since 2020)
970 square miles of land · 1 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.
3 active community water systems list Jones County in the area they serve, reporting 6,830 people served in all (a system that crosses county lines counts its whole population).
| WR/LJ - MNI WICONI buys surface water · private · SD4602223 | 5,185 served |
| WR/LJ - CREIGHTON PROJECT groundwater · private · SD4602156 | 1,170 served |
| MURDO buys surface water · local government · SD4600221 | 475 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 2 people were held in Jones County's jail, in Vera's latest figure (1978), or 210 per 100,000 residents ages 15–64. In 1970 it was about 2.
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.
1 school district has its office in Jones County. School taxes are usually the largest part of a property tax bill.
Spent $3.1 million — $2.7 million to run schools, about $14,875 per student, plus $232,000 on buildings and equipment. Money in: $1.9 million local (mostly property tax), $950,000 state, $381,000 federal. Long-term debt: $2.9 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: Very Low compared with other U.S. counties. FEMA estimates natural hazards cost Jones County about $2.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
37 bridges in Jones County: 6 in good condition, 29 fair, and 2 poor (5.4%). “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.
| 227TH STREET over WHITE CLAY CREEK · built 1965 | 21 vehicles a day |
| 227TH STREET over BAD RIVER · built 1918 | 6 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $620,103 of work in Jones County in fiscal 2025, about $676 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 Jones 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 Jones County built: brayden.ozark@gmail.com.
More of South Dakota: the state government and every county in South Dakota.
Nearby counties: Mellette County (26 mi) · Stanley County (32 mi) · Lyman County (42 mi) · Hughes County (46 mi) · Haakon County (48 mi) · Jackson County (50 mi).