27,518 people (2024 Census estimate, −1.4% since 2020)
618 square miles of land · 45 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.
14 active community water systems list Logan County in the area they serve, reporting 23,794 people served in all (a system that crosses county lines counts its whole population).
| IL AMERICAN-LINCOLN groundwater (surface-influenced) · private · IL1075030 | 15,200 served |
| ATLANTA groundwater · local government · IL1070050 | 1,692 served |
| IL AMERICAN-MOUNT PULASKI groundwater · local government · IL1070400 | 1,506 served |
| LOGAN CORRECTIONAL CENTER buys groundwater · state · IL1075520 | 1,500 served |
| LINCOLN CORRECTIONAL CENTER buys groundwater · state · IL1075450 | 1,036 served |
| ELKHART groundwater · local government · IL1070150 | 565 served |
| EMDEN groundwater · local government · IL1070200 | 467 served |
| BEASON CHESTNUT PWD groundwater · local government · IL1075150 | 435 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 39 people were held in Logan County's jail, in Vera's latest figure (2019), or 213 per 100,000 residents ages 15–64. In 2014 it was about 34.
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.
7 school districts have their office in Logan County. School taxes are usually the largest part of a property tax bill.
Spent $19.9 million — $18.1 million to run schools, about $17,100 per student, plus $1.2 million on buildings and equipment. Money in: $7.9 million local (mostly property tax), $12.9 million state, $3.4 million federal. Long-term debt: $8.9 million.
Spent $17.6 million — $13.5 million to run schools, about $17,162 per student, plus $3.2 million on buildings and equipment. Money in: $15.5 million local (mostly property tax), $7.6 million state, $889,000 federal. Long-term debt: $5.8 million.
Spent $10.4 million — $7.8 million to run schools, about $14,162 per student, plus $2.1 million on buildings and equipment. Money in: $14 million local (mostly property tax), $2 million state, $649,000 federal. Long-term debt: $11.5 million.
Spent $3.7 million — $3.3 million to run schools, about $11,835 per student, plus $187,000 on buildings and equipment. Money in: $4.5 million local (mostly property tax), $1.5 million state, $369,000 federal. Long-term debt: $1.8 million.
Spent $4 million — $3.4 million to run schools, about $16,588 per student, plus $406,000 on buildings and equipment. Money in: $3.9 million local (mostly property tax), $1.5 million state, $161,000 federal. Long-term debt: $905,000.
Spent $3.8 million — $3.4 million to run schools, about $18,070 per student, plus $270,000 on buildings and equipment. Money in: $3.8 million local (mostly property tax), $1.3 million state, $412,000 federal.
Spent $2.4 million — $1.8 million to run schools, about $24,493 per student, plus $378,000 on buildings and equipment. Money in: $3.9 million local (mostly property tax), $772,000 state, $251,000 federal. Long-term debt: $769,000.
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 Logan County about $20.3 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.
292 bridges in Logan County: 82 in good condition, 183 fair, and 27 poor (9.2%). “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.
| I-155 & RAMPS A & over S FK PRAIRIE CREEK · built 1990 | 5,825 vehicles a day |
| SOUTH BEASON RD over DEER CK BR · built 1965 | 800 vehicles a day |
| BL 55 (OLD US 66) over I-55 · built 1973 | 500 vehicles a day |
| PALMER AVE over BRAINARDS BRANCH · built 1966 | 500 vehicles a day |
| WAYNESVILLE ROAD over KICKAPOO CREEK · built 1980 | 325 vehicles a day |
| TR 199A over LAKE FORK · built 1978 | 225 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $14.6 million of work in Logan County in fiscal 2025, about $523 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 Logan 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 Logan County built: brayden.ozark@gmail.com.
More of Illinois: the state government and every county in Illinois.
Nearby counties: Menard County (24 mi) · De Witt County (25 mi) · Tazewell County (27 mi) · Macon County (28 mi) · Mason County (30 mi) · Sangamon County (30 mi).