15,743 people (2024 Census estimate, +1.0% since 2020)
456 square miles of land · 35 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 Marquette County in the area they serve, reporting 1,515 people served in all (a system that crosses county lines counts its whole population).
| MONTELLO WATERWORKS groundwater · local government · WI4390281 | 1,329 served |
| FOX MARQUETTE MOBILE HOME PARK groundwater · private · WI4390287 | 72 served |
| LILY MEADOWS ASSISTED LIVING groundwater · private · WI4390175 | 50 served |
| MEADOWBROOK MOBILE HOME PARK groundwater · private · WI4390542 | 39 served |
| DUCK INN MHP 2 groundwater · private · WI4390009 | 25 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 30 people were held in Marquette County's jail, in Vera's latest figure (2025). In 2020 it was about 22.
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 Marquette County. School taxes are usually the largest part of a property tax bill.
Spent $18.4 million — $14.1 million to run schools, about $13,410 per student, plus $1.7 million on buildings and equipment. Money in: $7.5 million local (mostly property tax), $8.4 million state, $3.4 million federal. Long-term debt: $500,000.
Spent $12.6 million — $10.5 million to run schools, about $17,713 per student, plus $104,000 on buildings and equipment. Money in: $5.2 million local (mostly property tax), $5.5 million state, $2.4 million federal. Long-term debt: $3.3 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 Marquette County about $13.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Moderate; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
81 bridges in Marquette County: 29 in good condition, 47 fair, and 5 poor (6.2%). “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.
| CTH O over FOX RIVER · built 1961 | 923 vehicles a day |
| CTH E over MONTELLO RIVER · built 1966 | 600 vehicles a day |
| LRD DOVER RD over MECAN RIVER · built 1977 | 153 vehicles a day |
| LRD 14TH RD over CNW RR · built 1940 | 95 vehicles a day |
| LRD 16TH RD over CNW RR · built 1950 | 47 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $10.4 million of work in Marquette County in fiscal 2025, about $666 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 Marquette 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 Marquette County built: brayden.ozark@gmail.com.
More of Wisconsin: the state government and every county in Wisconsin.
Nearby counties: Adams County (21 mi) · Waushara County (22 mi) · Green Lake County (22 mi) · Columbia County (25 mi) · Juneau County (36 mi) · Sauk County (38 mi).