104,269 people (2024 Census estimate, +0.1% since 2020)
720 square miles of land · 145 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.
17 active community water systems list Fond du Lac County in the area they serve, reporting 65,572 people served in all (a system that crosses county lines counts its whole population).
| FOND DU LAC WATERWORKS groundwater · local government · WI4200469 | 44,678 served |
| RIPON WATER UTILITY groundwater · local government · WI4200476 | 7,716 served |
| NORTH FOND DU LAC WATERWORKS groundwater · local government · WI4200405 | 5,414 served |
| CAMPBELLSPORT WATERWORKS groundwater · local government · WI4200461 | 1,825 served |
| OAKFIELD WATERWORKS groundwater · local government · WI4200475 | 1,058 served |
| ASHWOOD GROVE EDGEWATER groundwater · private · WI4200485 | 1,046 served |
| FOND DU LAC TN WATER UTILITY buys groundwater · local government · WI4200429 | 980 served |
| BRANDON WATERWORKS groundwater · local government · WI4200402 | 872 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 272 people were held in Fond du Lac County's jail, in Vera's latest figure (2025). In 2020 it was about 208.
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 Fond du Lac County. School taxes are usually the largest part of a property tax bill.
Spent $123.9 million — $94.8 million to run schools, about $14,355 per student, plus $14.2 million on buildings and equipment. Money in: $31.7 million local (mostly property tax), $69.8 million state, $16.2 million federal. Long-term debt: $83 million.
Spent $25.9 million — $23 million to run schools, about $13,564 per student, plus $252,000 on buildings and equipment. Money in: $9.6 million local (mostly property tax), $16.5 million state, $2.1 million federal. Long-term debt: $21 million.
Spent $26.6 million — $22.3 million to run schools, about $14,223 per student, plus $1.3 million on buildings and equipment. Money in: $10.1 million local (mostly property tax), $15.7 million state, $2.4 million federal. Long-term debt: $25.7 million.
Spent $20.2 million — $17.4 million to run schools, about $13,009 per student, plus $155,000 on buildings and equipment. Money in: $9.8 million local (mostly property tax), $11.4 million state, $1.7 million federal. Long-term debt: $20.2 million.
Spent $13.9 million — $11.9 million to run schools, about $12,375 per student, plus $725,000 on buildings and equipment. Money in: $4.8 million local (mostly property tax), $8.3 million state, $1.2 million federal. Long-term debt: $3.6 million.
Spent $17.6 million — $7.9 million to run schools, about $15,011 per student, plus $7.7 million on buildings and equipment. Money in: $5.8 million local (mostly property tax), $5.2 million state, $754,000 federal. Long-term debt: $19.2 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 Fond du Lac County about $44.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Very Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
252 bridges in Fond du Lac County: 127 in good condition, 98 fair, and 27 poor (10.7%). “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.
| LRD WESTERN AVE over E BR FOND DU LAC RIVER · built 1973 | 4,000 vehicles a day |
| LRD HICKORY ST over W BR FOND DU LAC RIVER · built 1965 | 3,900 vehicles a day |
| LRD PROMEN DR over LAKESIDE CREEK · built 1927 | 3,900 vehicles a day |
| CTH K over TAYCHEEDAH CREEK · built 1936 | 3,600 vehicles a day |
| LRD SCOTT ST over DE NEVEU CREEK · built 1965 | 3,100 vehicles a day |
| CTH T over TAYCHEEDAH CREEK · built 1955 | 2,500 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $22.5 million of work in Fond du Lac County in fiscal 2025, about $216 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 Fond du Lac 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 Fond du Lac County built: brayden.ozark@gmail.com.
More of Wisconsin: the state government and every county in Wisconsin.
Nearby counties: Green Lake County (24 mi) · Winnebago County (24 mi) · Dodge County (25 mi) · Calumet County (26 mi) · Washington County (28 mi) · Ozaukee County (37 mi).