133,785 people (2024 Census estimate, −0.3% since 2020)
706 square miles of land · 189 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 Calhoun County in the area they serve, reporting 76,536 people served in all (a system that crosses county lines counts its whole population).
| BATTLE CREEK - VERONA SYSTEM groundwater · local government · MI0000450 | 43,975 served |
| ALBION groundwater · local government · MI0000100 | 9,144 served |
| MARSHALL groundwater · local government · MI0004150 | 7,088 served |
| PENNFIELD TOWNSHIP groundwater · local government · MI0004760 | 3,916 served |
| SPRINGFIELD buys groundwater · local government · MI0006240 | 3,833 served |
| EMMETT TOWNSHIP buys groundwater · local government · MI0002125 | 2,550 served |
| HOMER groundwater · local government · MI0003220 | 1,668 served |
| ATHENS groundwater · local government · MI0000260 | 956 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 439 people were held in Calhoun County's jail, in Vera's latest figure (2023), or 526 per 100,000 residents ages 15–64. In 2018 it was about 555.
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.
9 school districts have their office in Calhoun County. School taxes are usually the largest part of a property tax bill.
Spent $66.4 million — $53.6 million to run schools, about $13,433 per student, plus $9.3 million on buildings and equipment. Money in: $14.9 million local (mostly property tax), $43.6 million state, $6.1 million federal. Long-term debt: $87.3 million.
Spent $89.9 million — $68.1 million to run schools, about $18,138 per student, plus $14.9 million on buildings and equipment. Money in: $27 million local (mostly property tax), $42.7 million state, $22.1 million federal. Long-term debt: $86.2 million.
Spent $44.4 million — $40.3 million to run schools, about $14,295 per student, plus $2.1 million on buildings and equipment. Money in: $13.7 million local (mostly property tax), $29.5 million state, $3.5 million federal. Long-term debt: $53.1 million.
Spent $43.2 million — $38.8 million to run schools, about $14,707 per student, plus $2.1 million on buildings and equipment. Money in: $13.4 million local (mostly property tax), $26.1 million state, $7.5 million federal. Long-term debt: $37.8 million.
Spent $34.9 million — $27 million to run schools, about $13,581 per student, plus $6.1 million on buildings and equipment. Money in: $6.6 million local (mostly property tax), $22.1 million state, $3.6 million federal. Long-term debt: $51.2 million.
Spent $14.8 million — $13.4 million to run schools, about $14,749 per student, plus $657,000 on buildings and equipment. Money in: $3.1 million local (mostly property tax), $10.4 million state, $2.1 million federal. Long-term debt: $17.1 million.
Spent $7.5 million — $7.2 million to run schools, about $14,290 per student, plus $292,000 on buildings and equipment. Money in: $2.5 million local (mostly property tax), $4.7 million state, $778,000 federal.
Spent $4.8 million — $4.4 million to run schools, about $14,462 per student, plus $372,000 on buildings and equipment. Money in: $1.4 million local (mostly property tax), $2.9 million state, $568,000 federal. Long-term debt: $465,000.
And 1 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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Calhoun County about $34.5 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.
213 bridges in Calhoun County: 43 in good condition, 133 fair, and 37 poor (17.4%). “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.
| M-89 over WABASCON CREEK · built 1947 | 14,726 vehicles a day |
| 17 MILE ROAD over I-94 · built 1960 | 13,254 vehicles a day |
| M-89 (WASHINGTON) over BATTLE CREEK RIVER · built 1982 | 11,004 vehicles a day |
| ELM STREET over BATTLE CREEK RIVER · built 1975 | 11,000 vehicles a day |
| M-96 W COLUMBIA over GTW RR · built 1986 | 6,300 vehicles a day |
| 25.5 MI ROAD over KALAMAZOO RIVER · built 1948 | 2,991 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $54.9 million of work in Calhoun County in fiscal 2025, about $409 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 Michigan 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 Calhoun 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 Calhoun County built: brayden.ozark@gmail.com.
More of Michigan: the state government and every county in Michigan.
Nearby counties: Branch County (23 mi) · Eaton County (25 mi) · Kalamazoo County (27 mi) · Barry County (28 mi) · Hillsdale County (29 mi) · Jackson County (30 mi).