64,109 people (2024 Census estimate, −2.3% since 2020)
855 square miles of land · 75 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.
19 active community water systems list Adams County in the area they serve, reporting 65,574 people served in all (a system that crosses county lines counts its whole population).
| QUINCY surface water · local government · IL0010650 | 42,000 served |
| ABS WATER COOP buys groundwater · private · IL0015350 | 7,095 served |
| MILL CREEK PWD groundwater · local government · IL0015300 | 5,755 served |
| CLAYTON-CAMP POINT WATER COMMISSION groundwater · local government · IL0015200 | 2,470 served |
| PAYSON groundwater · local government · IL0010550 | 1,386 served |
| CAMP POINT buys groundwater · local government · IL0010050 | 1,190 served |
| MENDON buys groundwater · local government · IL0010500 | 953 served |
| ADAMS COUNTY WATER DISTRICT NO 1 buys groundwater · local government · IL0015150 | 800 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 118 people were held in Adams County's jail, in Vera's latest figure (2023), or 302 per 100,000 residents ages 15–64. In 2018 it was about 20.
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.
5 school districts have their office in Adams County. School taxes are usually the largest part of a property tax bill.
Spent $97.5 million — $85.9 million to run schools, about $13,533 per student, plus $6.7 million on buildings and equipment. Money in: $45.3 million local (mostly property tax), $55.2 million state, $19.1 million federal. Long-term debt: $93.6 million.
Spent $12.9 million — $11.5 million to run schools, about $14,726 per student, plus $1.2 million on buildings and equipment. Money in: $5.1 million local (mostly property tax), $7.1 million state, $1.5 million federal. Long-term debt: $213,000.
Spent $9.3 million — $8 million to run schools, about $12,111 per student, plus $936,000 on buildings and equipment. Money in: $5.1 million local (mostly property tax), $5.2 million state, $1.3 million federal. Long-term debt: $6 million.
Spent $9.3 million — $8.8 million to run schools, about $13,871 per student, plus $290,000 on buildings and equipment. Money in: $3.7 million local (mostly property tax), $5.2 million state, $613,000 federal. Long-term debt: $73,000.
Spent $7 million — $6.5 million to run schools, about $13,164 per student, plus $437,000 on buildings and equipment. Money in: $3.5 million local (mostly property tax), $4.4 million state, $1.1 million federal. Long-term debt: $1.7 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 Adams County about $25.9 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
317 bridges in Adams County: 129 in good condition, 169 fair, and 19 poor (6.0%). “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.
| HARRISON STREET over CURTIS CREEK · built 1967 | 6,150 vehicles a day |
| FAI 172 SB over BURTON CREEK · built 1980 | 4,875 vehicles a day |
| IL 57 over MILL CREEK · built 1932 | 4,450 vehicles a day |
| FAI 172 SB over BN RR · built 1976 | 3,675 vehicles a day |
| FAI 172 NB over BN RR · built 1976 | 3,675 vehicles a day |
| CH 11 over SOUTH FORKBEAR CREEK · built 1975 | 900 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $42.7 million of work in Adams County in fiscal 2025, about $649 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 Adams 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 Adams County built: brayden.ozark@gmail.com.
More of Illinois: the state government and every county in Illinois.
Nearby counties: Brown County (24 mi) · Marion County, MO (26 mi) · Hancock County (29 mi) · Lewis County, MO (29 mi) · Pike County (30 mi) · Schuyler County (33 mi).