Brown County area

Population and density of Brown County

The Census Bureau estimates that 25,517 people lived in Brown County on July 1, 2025. That ranks #1,651 of 3,222 county equivalents nationally and #42 of 87 in Minnesota. Since the April 1, 2020 estimates base of 25,915, the population has declined by 398 (−1.5%), compared with +2.2% for Minnesota as a whole.

With 611.3 square miles of land, that is 42 people per square mile (16 per km²), placing Brown County #1,715 nationally for density and #33 in Minnesota. The median county equivalent has 47 people per square mile; the Minnesota median is 27. Put another way, there are about 15 acres of land per resident.

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 Brown County

Brown County is divided into 23 municipalities and townships. In Minnesota, county subdivisions are local governments, and together they cover all of the county’s land and residents.

The most populous is New Ulm city, with 13,863 residents (54.3% of the county). The largest by land is Home township, at 52.2 mi², or 8.5% of the county’s land. Among those with at least 1,000 residents in 2020, Sleepy Eye city grew fastest since then (+0.4%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Brown County. Land: 2026 Census Gazetteer. How communities are listed.

Metropolitan area

Brown County is a central county of the New Ulm, MN Micropolitan Statistical Area. Brown County is the area’s only county equivalent, so the micro area has the same 611.3 square miles of land. By combined land it ranks #348 of 542 micropolitan areas, and #477 by population. It belongs to the Mankato-New Ulm, MN Combined Statistical Area.

ZIP codes

11 ZIP Code Tabulation Areas have land in Brown County; 6 of them have most of their land inside the county, and the others mainly cover neighboring areas.

5533356019560305604156062560735608156083560855608756266

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 Brown County

Brown County shares a land border with 6 county equivalents. It has more land than 2 of them. The largest neighbor is Renville County (982.9 mi²) and the smallest is Watonwan County (435 mi²). Together with its neighbors, Brown County forms a block of 4,743.8 mi² of land, of which it holds 12.9%.

How big is Brown County compared with U.S. states?

Brown County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.7 times as much. Minnesota’s county land could hold about 130 areas the size of Brown County.

Another way to picture it: the same land area would fill a square about 24.7 miles (39.8 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 Brown County?

Brown County has more land than 1,639 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 Brown County at #1,684 nationally by total area, 101 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 1.2%, compared with a national county-equivalent median of 1.2%. The two percentages are within 0.1 percentage points of each other. 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 Brown County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

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.