2,737 people (2024 Census estimate, −2.4% since 2020)
1,864 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.
1 active community water system list Jackson County in the area they serve, reporting 543 people served in all (a system that crosses county lines counts its whole population).
| KADOKA buys surface water · local government · SD4600181 | 543 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 1 people were held in Jackson County's jail, in Vera's latest figure (1983), or 55 per 100,000 residents ages 15–64. In 1978 it was about 0.
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 Jackson County. School taxes are usually the largest part of a property tax bill.
Spent $11.5 million — $5.7 million to run schools, about $17,259 per student, plus $5.8 million on buildings and equipment. Money in: $2.3 million local (mostly property tax), $1.7 million state, $8 million federal. Long-term debt: $3.5 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 Jackson County about $2.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very Low; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
89 bridges in Jackson County: 26 in good condition, 50 fair, and 13 poor (14.6%). “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.
| IRR BIA RTE 2 over POTATO CREEK · built 1942 | 1,314 vehicles a day |
| COTTONWOOD ROAD over COTTONWOOD CK · built 1936 | 35 vehicles a day |
| 242 STREET over OUTLET FOR LAKE SPILLWAY · built 1935 | 35 vehicles a day |
| 227 AVENUE over FRANKLIN CK · built 1940 | 30 vehicles a day |
| OLD NE ROAD over BIG BUFFALO CK · built 1940 | 27 vehicles a day |
| HORSESHOE BUTTE RD over BLACK PIPE CK · built 1930 | 27 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $15.8 million of work in Jackson County in fiscal 2025, about $5,638 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 Jackson 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 Jackson County built: brayden.ozark@gmail.com.
More of South Dakota: the state government and every county in South Dakota.
Nearby counties: Bennett County (34 mi) · Haakon County (42 mi) · Mellette County (44 mi) · Jones County (51 mi) · Oglala Lakota County (52 mi) · Todd County (56 mi).