How many people live in Blue Earth County, MN?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 70,700 people living in Blue Earth County, MN. That makes Blue Earth County the 13th-most populous county in Minnesota. It is home to 1.2% of people living in the state.
70.7K
population of Blue Earth County, MN (2024)
1.2%
County share of the Minnesota population (2024)
About 70,700 people lived in Blue Earth County, MN in 2024.
Population estimates, 2000–2024
What are Blue Earth County, MN’s age demographics?
About 11,200 Blue Earth County residents are aged 65 and older in 2024. That represents 15.8% of its population. For comparison, the age group represents 18.3% of Minnesota’s population and 18% in the US overall.
Another 13,700 Blue Earth County residents, or 19.3% of the population, were children under 18. For comparison, the age group represents 22.4% of Minnesota’s population and 21.6% in the US overall.
A higher share of Blue Earth County, MN's population is aged 18–24 than the US as a whole.
Population estimates by age group, (2024)
What are Blue Earth County, MN’s racial and ethnic demographics?
Non-Hispanic white residents make up 83.8% of the Blue Earth County, MN population, higher than the national share of 57.5%.
In contrast, Blue Earth County’s Hispanic population accounts for 5.1%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 5.7% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Blue Earth County, MN has a higher share of a non-Hispanic white population than Minnesota as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Blue Earth County, MN is Mankato with about 46,500 residents in 2024.
Cities and towns in Blue Earth County, MN ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Mankato (pt.) | 46,454 |
| 2. | Eagle Lake | 3,333 |
| 3. | Lake Crystal | 2,485 |
| 4. | Mankato | 1,734 |
| 5. | Mapleton | 1,639 |
| 6. | South Bend | 1,565 |
| 7. | Madison Lake | 1,314 |
| 8. | Decoria | 1,108 |
| 9. | Rapidan | 1,037 |
| 10. | Lime | 933 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
