13,627 people (2024 Census estimate, −3.6% since 2020)
237 square miles of land · 57 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.
4 active community water systems list Massac County in the area they serve, reporting 13,844 people served in all (a system that crosses county lines counts its whole population).
| FORT MASSAC PWD buys groundwater · local government · IL1275050 | 6,360 served |
| METROPOLIS groundwater · local government · IL1270150 | 6,309 served |
| BROOKPORT groundwater · local government · IL1270050 | 730 served |
| JOPPA groundwater · local government · IL1270100 | 445 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 21 people were held in Massac County's jail, in Vera's latest figure (2023), or 246 per 100,000 residents ages 15–64. In 2018 it was about 38.
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.
2 school districts have their office in Massac County. School taxes are usually the largest part of a property tax bill.
Spent $34.2 million — $30.4 million to run schools, about $16,174 per student, plus $3.4 million on buildings and equipment. Money in: $7.9 million local (mostly property tax), $25.1 million state, $7.3 million federal. Long-term debt: $3.2 million.
Spent $4.8 million — $4.4 million to run schools, about $19,305 per student, plus $252,000 on buildings and equipment. Money in: $1.6 million local (mostly property tax), $4 million state, $903,000 federal. Long-term debt: $59,000.
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 Massac County about $18.5 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
132 bridges in Massac County: 61 in good condition, 60 fair, and 11 poor (8.3%). “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.
| FAS 929 over ICGRR · built 1985 | 650 vehicles a day |
| PELL ROAD over STREAM E OF US 45 · built 1900 | 550 vehicles a day |
| TR 117 over WEAVER CREEK · built 1980 | 275 vehicles a day |
| CRESTWOOD ROAD over BARNES CREEK · built 1939 | 200 vehicles a day |
| TR-59 (Mermet Road over SIELBECK DITCH · built 2018 | 175 vehicles a day |
| TWP RD 58 over BEAR CK · built 1977 | 100 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $12.4 million of work in Massac County in fiscal 2025, about $878 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 Massac 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 Massac County built: brayden.ozark@gmail.com.
More of Illinois: the state government and every county in Illinois.
Nearby counties: McCracken County, KY (11 mi) · Pope County (17 mi) · Livingston County, KY (19 mi) · Johnson County (19 mi) · Ballard County, KY (20 mi) · Pulaski County (23 mi).