2,752 people (2024 Census estimate, +0.4% since 2020)
708 square miles of land · 4 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.
5 active community water systems list Aurora County in the area they serve, reporting 7,697 people served in all (a system that crosses county lines counts its whole population).
| DAVISON RURAL WATER SYSTEM INC buys surface water · private · SD4601090 | 3,485 served |
| AURORA-BRULE RURAL WATER SYSTEM surface water · private · SD4600621 | 2,750 served |
| PLANKINTON buys surface water · local government · SD4600245 | 782 served |
| WHITE LAKE buys surface water · local government · SD4600366 | 359 served |
| STICKNEY buys surface water · local government · SD4600318 | 321 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 0 people were held in Aurora County's jail, in Vera's latest figure (1970).
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.
2 school districts have their office in Aurora County. School taxes are usually the largest part of a property tax bill.
Spent $4.4 million — $4.1 million to run schools, about $14,643 per student, plus $240,000 on buildings and equipment. Money in: $2.3 million local (mostly property tax), $1.8 million state, $370,000 federal. Long-term debt: $181,000.
Spent $2.2 million — $2 million to run schools, about $15,860 per student, plus $33,000 on buildings and equipment. Money in: $1.7 million local (mostly property tax), $592,000 state, $229,000 federal. Long-term debt: $4.3 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 Aurora County about $8.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
61 bridges in Aurora County: 25 in good condition, 29 fair, and 7 poor (11.5%). “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.
| 242 ST over CK · built 1917 | 101 vehicles a day |
| 265 ST over PLATTE CK · built 1967 | 66 vehicles a day |
| 246 ST over FIRESTEEL CK · built 1930 | 65 vehicles a day |
| 378 AVE over WEST FIRESTEEL CK · built 1936 | 62 vehicles a day |
| 383 AVE over WEST FIRESTEEL CK · built 1973 | 33 vehicles a day |
| 244 ST over FIRESTEEL CK · built 1940 | 33 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $3.4 million of work in Aurora County in fiscal 2025, about $1,250 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 Aurora 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 Aurora County built: brayden.ozark@gmail.com.
More of South Dakota: the state government and every county in South Dakota.
Nearby counties: Davison County (21 mi) · Jerauld County (23 mi) · Douglas County (25 mi) · Brule County (26 mi) · Sanborn County (32 mi) · Charles Mix County (36 mi).