66,486 people (2024 Census estimate, +1.1% since 2020)
832 square miles of land · 80 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.
25 active community water systems list Sauk County in the area they serve, reporting 40,545 people served in all (a system that crosses county lines counts its whole population).
| BARABOO WATERWORKS groundwater · local government · WI1570085 | 12,703 served |
| REEDSBURG WATERWORKS groundwater · local government · WI1570102 | 9,984 served |
| PRAIRIE DU SAC WATERWORKS groundwater · local government · WI1570100 | 4,006 served |
| SAUK CITY WATERWORKS groundwater · local government · WI1570105 | 3,518 served |
| LAKE DELTON WATERWORKS groundwater · local government · WI1570664 | 2,914 served |
| SPRING GREEN WATERWORKS groundwater · local government · WI1570109 | 1,626 served |
| WEST BARABOO WATERWORKS groundwater · local government · WI1570112 | 1,414 served |
| PLAIN WATERWORKS groundwater · local government · WI1570098 | 792 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 113 people were held in Sauk County's jail, in Vera's latest figure (2025). In 2020 it was about 126.
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.
6 school districts have their office in Sauk County. School taxes are usually the largest part of a property tax bill.
Spent $47.6 million — $36.3 million to run schools, about $13,355 per student, plus $5.9 million on buildings and equipment. Money in: $26.2 million local (mostly property tax), $21.3 million state, $5 million federal. Long-term debt: $82 million.
Spent $45.5 million — $38.9 million to run schools, about $14,386 per student, plus $1.5 million on buildings and equipment. Money in: $19.4 million local (mostly property tax), $27.2 million state, $5.7 million federal. Long-term debt: $53.4 million.
Spent $41.6 million — $36.9 million to run schools, about $13,942 per student, plus $473,000 on buildings and equipment. Money in: $15.7 million local (mostly property tax), $26.5 million state, $5.4 million federal. Long-term debt: $25.4 million.
Spent $38.5 million — $23.5 million to run schools, about $12,948 per student, plus $11.6 million on buildings and equipment. Money in: $30 million local (mostly property tax), $10.4 million state, $3.2 million federal. Long-term debt: $27.4 million.
Spent $22 million — $18.4 million to run schools, about $16,563 per student, plus $2 million on buildings and equipment. Money in: $10.2 million local (mostly property tax), $9.5 million state, $3 million federal. Long-term debt: $741,000.
Spent $7.7 million — $5.2 million to run schools, about $20,694 per student, plus $1.7 million on buildings and equipment. Money in: $2.6 million local (mostly property tax), $3.1 million state, $1.1 million federal. Long-term debt: $2.3 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: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Sauk County about $35.6 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
275 bridges in Sauk County: 138 in good condition, 112 fair, and 25 poor (9.1%). “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.
| STH 23-STH 33-MAIN over BARABOO RIVER · built 1985 | 14,200 vehicles a day |
| CTH H over DELL CREEK · built 1971 | 4,000 vehicles a day |
| CTH B MAIN ST over BR HONEY CREEK · built 1969 | 1,500 vehicles a day |
| CTH HH over DELL CREEK · built 1974 | 1,100 vehicles a day |
| CTH X over BARABOO RIVER · built 1956 | 790 vehicles a day |
| CTH W over SKILLET CREEK · built 1939 | 738 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $25.2 million of work in Sauk County in fiscal 2025, about $383 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 Wisconsin 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 Sauk 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 Sauk County built: brayden.ozark@gmail.com.
More of Wisconsin: the state government and every county in Wisconsin.
Nearby counties: Richland County (25 mi) · Columbia County (31 mi) · Iowa County (31 mi) · Juneau County (36 mi) · Dane County (36 mi) · Marquette County (38 mi).