County outline
Where Calhoun County is located
Area breakdown
Land accounts for 98.3% of Calhoun County’s measured area and water for 1.7%. Its combined area converts to 1,860.5 square kilometers or approximately 459,730 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 706.259 | 1,829.202 | 452,005.8 |
| Water | 12.069 | 31.259 | 7,724.2 |
| Total | 718.328 | 1,860.461 | 459,729.9 |
How Calhoun County compares
By original Census land area, Calhoun County ranks #26 of 83 in Michigan and #1307 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.244 times the Michigan county-equivalent median of 567.8 square miles. It accounts for 1.2% of the combined county land area in the state.
See the complete Michigan ranking · What counts as a county equivalent?
Population and density of Calhoun County
The Census Bureau estimates that 133,408 people lived in Calhoun County on July 1, 2025. That ranks #499 of 3,222 county equivalents nationally and #17 of 83 in Michigan. Since the April 1, 2020 estimates base of 134,303, the population has declined by 895 (−0.7%), compared with +0.5% for Michigan as a whole.
With 706.3 square miles of land, that is 189 people per square mile (73 per km²), placing Calhoun County #660 nationally for density and #20 in Michigan. The median county equivalent has 47 people per square mile; the Michigan median is 62. Put another way, there are about 3.4 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 134,198 | 133,907 | 133,439 | 133,331 | 133,611 | 133,408 |
| Change | — | −291 | −468 | −108 | +280 | −203 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Calhoun County
Calhoun County is divided into 23 municipalities and townships. In Michigan, county subdivisions are local governments, and together they cover all of the county’s land and residents.
The most populous is Battle Creek city, with 52,021 residents (39% of the county), and it is also the largest by land at 42.6 mi². The county seat, Marshall city, has 6,800 residents. Among those with at least 1,000 residents in 2020, Sheridan township grew fastest since then (+6%).
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Battle Creek city | 52,021 | −1.4% | 42.6 | 6% |
| Emmett charter township | 11,712 | −0.2% | 32.1 | 4.5% |
| Bedford charter township | 9,145 | −0.6% | 29.1 | 4.1% |
| Pennfield charter township | 8,681 | −0.7% | 34.2 | 4.8% |
| Albion city | 7,474 | −3% | 4.41 | 0.6% |
| Marshall cityCounty seat | 6,800 | −1% | 9.11 | 1.3% |
| Springfield city | 5,246 | −0.7% | 3.633 | 0.5% |
| Leroy township | 3,680 | +0.7% | 36 | 5.1% |
| Marshall townshipCounty seat | 3,162 | +1.2% | 28.4 | 4% |
| Homer township | 2,897 | −0% | 35.7 | 5% |
| Newton township | 2,800 | +0.5% | 36 | 5.1% |
| Athens township | 2,458 | +0.6% | 35.9 | 5.1% |
| Marengo township | 2,231 | +1.3% | 35 | 5% |
| Burlington township | 1,984 | +1.4% | 35.7 | 5.1% |
| Sheridan township | 1,911 | +6% | 31.3 | 4.4% |
Show the other 8 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Clarence township | 1,897 | −0.2% | 32.5 |
| Fredonia township | 1,589 | −0.1% | 33.9 |
| Tekonsha township | 1,579 | +4% | 35.4 |
| Convis township | 1,534 | +2.1% | 35.4 |
| Eckford township | 1,282 | −1.4% | 35.4 |
| Clarendon township | 1,182 | 0% | 35.5 |
| Albion township | 1,086 | −0.6% | 32.7 |
| Lee township | 1,057 | 0% | 36.2 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Calhoun County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Calhoun County is a central county of the Battle Creek, MI Metropolitan Statistical Area. Calhoun County is the area’s only county equivalent, so the metro area has the same 706.3 square miles of land. By combined land it ranks #319 of 393 metropolitan areas, and #315 by population. It belongs to the Kalamazoo-Battle Creek-Portage, MI Combined Statistical Area.
ZIP codes
22 ZIP Code Tabulation Areas have land in Calhoun County; 12 of them have most of their land inside the county, and the others mainly cover neighboring areas.
48813490114901249014490154901749021490294903349034490374905149052490684907649092490944922449237492454925249284
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Calhoun County
Calhoun County shares a land border with 6 county equivalents. It has more land than every one of them. The largest neighbor is Jackson County (701.9 mi²) and the smallest is Branch County (506.4 mi²). Together with its neighbors, Calhoun County forms a block of 4,203 mi² of land, of which it holds 16.8%.
| Bordering county equivalent | Land mi² | Size vs. Calhoun | Compare |
|---|---|---|---|
| Jackson County | 701.9 | about the same | Compare |
| Hillsdale County | 598.2 | 1.2× smaller | Compare |
| Eaton County | 575.2 | 1.2× smaller | Compare |
| Kalamazoo County | 562 | 1.3× smaller | Compare |
| Barry County | 553.1 | 1.3× smaller | Compare |
| Branch County | 506.4 | 1.4× smaller | Compare |
How big is Calhoun County compared with U.S. states?
Calhoun County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.5 times as much. Michigan’s county land could hold about 80 areas the size of Calhoun County.
Another way to picture it: the same land area would fill a square about 26.6 miles (42.8 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Calhoun County?
Calhoun County has more land than 1,915 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Calhoun County at #1,380 nationally by total area, 73 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 1.7%, compared with a national county-equivalent median of 1.2% — 0.5 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Calhoun County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1306 | Craven County, North Carolina | 706.5 | Compare |
| #1307 | Calhoun County, Michigan | 706.3 | This county |
| #1308 | Marshall County, Mississippi | 706.2 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 42.242990, -85.012385. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 1,829,201,520 m²; AWATER: 31,257,734 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Calhoun County?
Calhoun County, Michigan has 706.3 square miles (1,829.2 km²) of land and 12.1 square miles of water, for a total area of 718.3 square miles. It ranks #1307 of 3,222 U.S. county equivalents by land area.
Is Calhoun County the largest county in Michigan?
No. Calhoun County ranks #26 of 83 in Michigan by land area. The largest is Marquette County, with 1,809.1 square miles of land.
What counties border Calhoun County?
Calhoun County shares a land border with Jackson County, Kalamazoo County, Branch County, Eaton County, Barry County, and Hillsdale County.
What is the population of Calhoun County?
The Census Bureau estimates Calhoun County had 133,408 residents on July 1, 2025, ranking #499 of 3,222 county equivalents. That is 189 people per square mile of land.
What is the county seat of Calhoun County?
The county seat of Calhoun County is Marshall.
What cities and towns are in Calhoun County?
Calhoun County has 23 county subdivisions (cities, towns and townships). The most populous five are Battle Creek city, Emmett charter township, Bedford charter township, Pennfield charter township, and Albion city.
Is Calhoun County part of a metropolitan area?
Yes. It is a central county of the Battle Creek, MI Metropolitan Statistical Area.
How many ZIP codes are in Calhoun County?
22 ZIP Code Tabulation Areas have land in Calhoun County, and 12 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Calhoun County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.5 times as much land.
How many acres of land are in Calhoun County?
The land measurement converts to approximately 452,006 acres. Including water, total area is approximately 459,730 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.