30,801 people (2024 Census estimate, −0.0% since 2020)
733 square miles of land · 42 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.
14 active community water systems list Trempealeau County in the area they serve, reporting 16,825 people served in all (a system that crosses county lines counts its whole population).
| ARCADIA WATERWORKS groundwater · local government · WI6620319 | 3,737 served |
| TREMPEALEAU WATERWORKS groundwater · local government · WI6620332 | 1,888 served |
| WHITEHALL WATERWORKS groundwater · local government · WI6620275 | 1,820 served |
| OSSEO WATERWORKS groundwater · local government · WI6620328 | 1,701 served |
| GALESVILLE WATERWORKS groundwater · local government · WI6620271 | 1,679 served |
| INDEPENDENCE WATERWORKS groundwater · local government · WI6620276 | 1,500 served |
| BLAIR WATERWORKS groundwater · local government · WI6620274 | 1,280 served |
| STRUM WATERWORKS groundwater · local government · WI6620331 | 1,100 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 59 people were held in Trempealeau County's jail, in Vera's latest figure (2025). In 2020 it was about 18.
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.
7 school districts have their office in Trempealeau County. School taxes are usually the largest part of a property tax bill.
Spent $23.8 million — $20.8 million to run schools, about $15,261 per student, plus $916,000 on buildings and equipment. Money in: $10.1 million local (mostly property tax), $14.2 million state, $2.2 million federal. Long-term debt: $18.3 million.
Spent $22.7 million — $19.3 million to run schools, about $15,005 per student, plus $413,000 on buildings and equipment. Money in: $7.1 million local (mostly property tax), $16.3 million state, $2.4 million federal. Long-term debt: $12.9 million.
Spent $15.8 million — $13 million to run schools, about $16,091 per student, plus $1.4 million on buildings and equipment. Money in: $5.3 million local (mostly property tax), $9.5 million state, $2.5 million federal. Long-term debt: $4.5 million.
Spent $15.2 million — $12.5 million to run schools, about $16,157 per student, plus $1.2 million on buildings and equipment. Money in: $4.5 million local (mostly property tax), $8.6 million state, $2.4 million federal. Long-term debt: $8.9 million.
Spent $11.3 million — $10 million to run schools, about $14,955 per student, plus $292,000 on buildings and equipment. Money in: $4.1 million local (mostly property tax), $7.5 million state, $1.6 million federal. Long-term debt: $10.2 million.
Spent $12.5 million — $9.9 million to run schools, about $15,731 per student, plus $179,000 on buildings and equipment. Money in: $5.4 million local (mostly property tax), $6.8 million state, $1.9 million federal. Long-term debt: $17.4 million.
Spent $8 million — $6.7 million to run schools, about $15,516 per student, plus $137,000 on buildings and equipment. Money in: $2.1 million local (mostly property tax), $5.4 million state, $1.1 million federal. Long-term debt: $328,000.
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: Relatively Low compared with other U.S. counties. FEMA estimates natural hazards cost Trempealeau County about $20.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
259 bridges in Trempealeau County: 116 in good condition, 110 fair, and 33 poor (12.7%). “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.
| USH 10-USH 53-10TH over BUFFALO RIVER · built 1937 | 4,400 vehicles a day |
| CTH D over ELK CREEK · built 1958 | 542 vehicles a day |
| CTH G over BR PINE CREEK · built 1915 | 531 vehicles a day |
| LRD S. RIVER RD over TRUMP COULEE CREEK · built 1959 | 470 vehicles a day |
| CTH E over ELK CREEK · built 1960 | 412 vehicles a day |
| CTH E over BR ELK CREEK · built 1968 | 412 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $12.1 million of work in Trempealeau County in fiscal 2025, about $393 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 Trempealeau 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 Trempealeau County built: brayden.ozark@gmail.com.
More of Wisconsin: the state government and every county in Wisconsin.
Nearby counties: Buffalo County (21 mi) · Jackson County (28 mi) · Eau Claire County (29 mi) · La Crosse County (30 mi) · Winona County, MN (30 mi) · Pepin County (32 mi).