37,183 people (2024 Census estimate, +0.4% since 2020)
584 square miles of land · 64 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.
10 active community water systems list Green County in the area they serve, reporting 23,377 people served in all (a system that crosses county lines counts its whole population).
| MONROE WATERWORKS groundwater · local government · WI1230078 | 10,780 served |
| BRODHEAD WATERWORKS groundwater · local government · WI1230072 | 3,216 served |
| BELLEVILLE WATERWORKS groundwater · local government · WI1130209 | 2,712 served |
| NEW GLARUS WATERWORKS groundwater · local government · WI1230084 | 2,348 served |
| BROOKLYN WATERWORKS groundwater · local government · WI1230075 | 1,524 served |
| MONTICELLO WATERWORKS groundwater · local government · WI1230083 | 1,217 served |
| ALBANY WATERWORKS groundwater · local government · WI1230071 | 1,018 served |
| PLEASANT VIEW NURSING HOME groundwater · local government · WI1230081 | 260 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 44 people were held in Green County's jail, in Vera's latest figure (2025). In 2020 it was about 25.
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 Green County. School taxes are usually the largest part of a property tax bill.
Spent $42.2 million — $34.5 million to run schools, about $15,391 per student, plus $2.6 million on buildings and equipment. Money in: $21.2 million local (mostly property tax), $23.7 million state, $4.9 million federal. Long-term debt: $4.3 million.
Spent $16.6 million — $15.1 million to run schools, about $14,823 per student, plus $545,000 on buildings and equipment. Money in: $5.3 million local (mostly property tax), $9.7 million state, $2.3 million federal.
Spent $16.9 million — $13.4 million to run schools, about $13,901 per student, plus $2.1 million on buildings and equipment. Money in: $9.1 million local (mostly property tax), $8.9 million state, $1.4 million federal. Long-term debt: $31.2 million.
Spent $7.2 million — $5.5 million to run schools, about $18,480 per student, plus $848,000 on buildings and equipment. Money in: $3 million local (mostly property tax), $3.2 million state, $572,000 federal. Long-term debt: $121,000.
Spent $5.6 million — $4.5 million to run schools, about $15,965 per student, plus $279,000 on buildings and equipment. Money in: $2.7 million local (mostly property tax), $2.5 million state, $662,000 federal. Long-term debt: $4.7 million.
Spent $7.4 million — $5.9 million to run schools, about $21,590 per student, plus $124,000 on buildings and equipment. Money in: $3.3 million local (mostly property tax), $3.9 million state, $751,000 federal. Long-term debt: $1.8 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 Green County about $17.8 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.
241 bridges in Green County: 121 in good condition, 96 fair, and 24 poor (10.0%). “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 COATES AVE over BR LITTLE SUGAR RIVER · built 1992 | 2,100 vehicles a day |
| CTH CC over BR ROSS CROSSING CREEK · built 1957 | 1,600 vehicles a day |
| LRD LAKE AVE over W BR LITTLE SUGAR RIVER · built 1974 | 1,055 vehicles a day |
| CTH B over HONEY CREEK · built 1933 | 860 vehicles a day |
| CTH EE WISCONSIN over W BR LITTLE SUGAR RIVER · built 1968 | 860 vehicles a day |
| CTH B over BR HONEY CREEK · built 1953 | 860 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 Green County in fiscal 2025, about $279 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 Green 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 Green County built: brayden.ozark@gmail.com.
More of Wisconsin: the state government and every county in Wisconsin.
Nearby counties: Stephenson County, IL (23 mi) · Lafayette County (27 mi) · Rock County (27 mi) · Dane County (29 mi) · Winnebago County, IL (32 mi) · Iowa County (35 mi).