County outline
Where Mecosta County is located
Area breakdown
Land accounts for 97.2% of Mecosta County’s measured area and water for 2.8%. Its combined area converts to 1,479.5 square kilometers or approximately 365,595 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 555.157 | 1,437.85 | 355,300.5 |
| Water | 16.085 | 41.66 | 10,294.4 |
| Total | 571.242 | 1,479.51 | 365,594.9 |
How Mecosta County compares
By original Census land area, Mecosta County ranks #57 of 83 in Michigan and #1871 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.978 times the Michigan county-equivalent median of 567.8 square miles. It accounts for 1% of the combined county land area in the state.
See the complete Michigan ranking · What counts as a county equivalent?
Population and density of Mecosta County
The Census Bureau estimates that 42,320 people lived in Mecosta County on July 1, 2025. That ranks #1,165 of 3,222 county equivalents nationally and #39 of 83 in Michigan. Since the April 1, 2020 estimates base of 40,332, the population has grown by 1,988 (+4.9%), compared with +0.5% for Michigan as a whole.
With 555.2 square miles of land, that is 76 people per square mile (29 per km²), placing Mecosta County #1,196 nationally for density and #36 in Michigan. The median county equivalent has 47 people per square mile; the Michigan median is 62. Put another way, there are about 8.4 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 40,414 | 40,674 | 41,393 | 41,715 | 41,932 | 42,320 |
| Change | — | +260 | +719 | +322 | +217 | +388 |
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 Mecosta County
Mecosta County is divided into 17 municipalities and townships. In Michigan, county subdivisions are local governments, and together they cover all of the county’s land and residents; a few are unorganized areas without their own government.
The most populous is Big Rapids city, with 8,623 residents (20.4% of the county). The largest by land is Green charter township, at 37 mi², or 6.7% of the county’s land. Among those with at least 1,000 residents in 2020, Morton township grew fastest since then (+7.8%).
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Big Rapids cityCounty seat | 8,623 | +3.3% | 4.445 | 0.8% |
| Morton township | 4,766 | +7.8% | 33 | 6% |
| Big Rapids charter townshipCounty seat | 4,096 | +4.2% | 30.5 | 5.5% |
| Green charter township | 3,408 | +5.8% | 37 | 6.7% |
| Mecosta township | 2,891 | +5.4% | 34 | 6.1% |
| Aetna township | 2,357 | +5.4% | 35.6 | 6.4% |
| Colfax township | 2,036 | +4% | 35.1 | 6.3% |
| Deerfield township | 1,882 | +5.5% | 35.7 | 6.4% |
| Austin township | 1,805 | +5.2% | 35.7 | 6.4% |
| Fork township | 1,700 | +4.9% | 34.8 | 6.3% |
| Martiny township | 1,673 | +5% | 32 | 5.8% |
| Wheatland township | 1,455 | +4% | 35.5 | 6.4% |
| Sheridan township | 1,384 | +5.4% | 34.8 | 6.3% |
| Chippewa township | 1,285 | +5.2% | 33 | 5.9% |
| Hinton township | 1,111 | +5.5% | 35.7 | 6.4% |
Show the other 2 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Millbrook township | 1,111 | +4.4% | 35.8 |
| Grant township | 737 | +4.4% | 32.6 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Mecosta County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Mecosta County is a central county of the Big Rapids, MI Micropolitan Statistical Area. Mecosta County is the area’s only county equivalent, so the micro area has the same 555.2 square miles of land. By combined land it ranks #393 of 542 micropolitan areas, and #297 by population. It belongs to the Grand Rapids-Wyoming, MI Combined Statistical Area.
ZIP codes
17 ZIP Code Tabulation Areas have land in Mecosta County; 8 of them have most of their land inside the county, and the others mainly cover neighboring areas.
4863248850488864930549307493104932049332493364933749338493404934249346496314963949679
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 Mecosta County
Mecosta County shares a land border with 4 county equivalents. Each of them has more land than Mecosta County. The largest neighbor is Newaygo County (838.9 mi²) and the smallest is Osceola County (566.3 mi²). Together with its neighbors, Mecosta County forms a block of 3,238.4 mi² of land, of which it holds 17.1%.
| Bordering county equivalent | Land mi² | Size vs. Mecosta | Compare |
|---|---|---|---|
| Newaygo County | 838.9 | 1.5× larger | Compare |
| Montcalm County | 705.3 | 1.3× larger | Compare |
| Isabella County | 572.7 | about the same | Compare |
| Osceola County | 566.3 | about the same | Compare |
How big is Mecosta County compared with U.S. states?
Mecosta County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.9 times as much. Michigan’s county land could hold about 102 areas the size of Mecosta County.
Another way to picture it: the same land area would fill a square about 23.6 miles (37.9 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 Mecosta County?
Mecosta County has more land than 1,351 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 Mecosta County at #1,917 nationally by total area, 46 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 2.8%, compared with a national county-equivalent median of 1.2% — 1.6 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 Mecosta County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1870 | Walworth County, Wisconsin | 555.4 | Compare |
| #1871 | Mecosta County, Michigan | 555.2 | This county |
| #1872 | Wayne County, Ohio | 555 | 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 43.635295, -85.332751. 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: 1,437,849,484 m²; AWATER: 41,659,793 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 Mecosta County?
Mecosta County, Michigan has 555.2 square miles (1,437.9 km²) of land and 16.1 square miles of water, for a total area of 571.2 square miles. It ranks #1871 of 3,222 U.S. county equivalents by land area.
Is Mecosta County the largest county in Michigan?
No. Mecosta County ranks #57 of 83 in Michigan by land area. The largest is Marquette County, with 1,809.1 square miles of land.
What counties border Mecosta County?
Mecosta County shares a land border with Isabella County, Newaygo County, Montcalm County, and Osceola County.
What is the population of Mecosta County?
The Census Bureau estimates Mecosta County had 42,320 residents on July 1, 2025, ranking #1,165 of 3,222 county equivalents. That is 76 people per square mile of land.
What is the county seat of Mecosta County?
The county seat of Mecosta County is Big Rapids.
What cities and towns are in Mecosta County?
Mecosta County has 17 county subdivisions (cities, towns and townships). The most populous five are Big Rapids city, Morton township, Big Rapids charter township, Green charter township, and Mecosta township.
Is Mecosta County part of a metropolitan area?
Yes. It is a central county of the Big Rapids, MI Micropolitan Statistical Area.
How many ZIP codes are in Mecosta County?
17 ZIP Code Tabulation Areas have land in Mecosta County, and 8 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Mecosta County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.9 times as much land.
How many acres of land are in Mecosta County?
The land measurement converts to approximately 355,300 acres. Including water, total area is approximately 365,595 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.