708,583 people (2024 Census estimate, +1.7% since 2020)
836 square miles of land · 848 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.
52 active community water systems list Will County in the area they serve, reporting 588,523 people served in all (a system that crosses county lines counts its whole population).
| JOLIET groundwater · local government · IL1970450 | 160,000 served |
| IL AMERICAN-WEST SUBURBAN buys surface water · private · IL1974151 | 73,978 served |
| ROMEOVILLE groundwater · local government · IL1970900 | 50,458 served |
| PLAINFIELD buys surface water · local government · IL1970800 | 50,000 served |
| NEW LENOX buys surface water · local government · IL1970700 | 29,200 served |
| IL AMERICAN-HOMER TOWNSHIP buys surface water · private · IL1970100 | 24,543 served |
| FRANKFORT groundwater · local government · IL1970400 | 24,000 served |
| LOCKPORT groundwater · local government · IL1970500 | 23,100 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 602 people were held in Will County's jail, in Vera's latest figure (2021), or 129 per 100,000 residents ages 15–64. In 2016 it was about 716.
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.
30 school districts have their office in Will County. School taxes are usually the largest part of a property tax bill.
Spent $437.1 million — $395.1 million to run schools, about $15,896 per student, plus $25.5 million on buildings and equipment. Money in: $229.9 million local (mostly property tax), $218.4 million state, $26.1 million federal. Long-term debt: $161.8 million.
Spent $374.2 million — $346.9 million to run schools, about $22,840 per student, plus $21.1 million on buildings and equipment. Money in: $222.2 million local (mostly property tax), $171.1 million state, $30.3 million federal. Long-term debt: $291.1 million.
Spent $234.8 million — $216.7 million to run schools, about $22,679 per student, plus $15.5 million on buildings and equipment. Money in: $52 million local (mostly property tax), $179.9 million state, $30.6 million federal. Long-term debt: $36.4 million.
Spent $147.8 million — $139.6 million to run schools, about $20,179 per student, plus $4.4 million on buildings and equipment. Money in: $96.6 million local (mostly property tax), $86.9 million state, $15.4 million federal. Long-term debt: $83.6 million.
Spent $157 million — $126 million to run schools, about $18,791 per student, plus $8.2 million on buildings and equipment. Money in: $114.8 million local (mostly property tax), $48.1 million state, $2.8 million federal. Long-term debt: $205.1 million.
Spent $80.4 million — $74.1 million to run schools, about $14,677 per student, plus $2.6 million on buildings and equipment. Money in: $67.3 million local (mostly property tax), $23.1 million state, $2 million federal. Long-term debt: $130.9 million.
Spent $142 million — $101.4 million to run schools, about $22,965 per student, plus $33 million on buildings and equipment. Money in: $57.9 million local (mostly property tax), $46.9 million state, $11.1 million federal. Long-term debt: $129.6 million.
Spent $79.4 million — $69.7 million to run schools, about $17,369 per student, plus $5.4 million on buildings and equipment. Money in: $55.4 million local (mostly property tax), $24.2 million state, $2.5 million federal. Long-term debt: $45.6 million.
And 22 more.
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 High compared with other U.S. counties. FEMA estimates natural hazards cost Will County about $348.1 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.
656 bridges in Will County: 284 in good condition, 307 fair, and 65 poor (9.9%). “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.
| I- 55 over JOLIET RD · built 1955 | 73,200 vehicles a day |
| I- 80 WB over IL 53 · built 1967 | 45,600 vehicles a day |
| I- 80 EB over RR & GARDNER ST · built 1964 | 45,600 vehicles a day |
| I- 80 WB over RR & GARDNER ST · built 1964 | 45,600 vehicles a day |
| I- 80 EB over DUPAGE RIVER · built 1960 | 25,150 vehicles a day |
| I- 80 EB over I- 55 · built 1960 | 25,150 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $188.5 million of work in Will County in fiscal 2025, about $271 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 Illinois 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 Will 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 Will County built: brayden.ozark@gmail.com.
More of Illinois: the state government and every county in Illinois.
Nearby counties: Kankakee County (22 mi) · Grundy County (24 mi) · Kendall County (25 mi) · DuPage County (28 mi) · Lake County, IN (31 mi) · Cook County (35 mi).