How many people live in Bremer County, IA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 25,300 people living in Bremer County, IA. That makes Bremer County the 26th-most populous county in Iowa. It is home to 0.78% of people living in the state.
25.3K
population of Bremer County, IA (2024)
0.78%
County share of the Iowa population (2024)
About 25,300 people lived in Bremer County, IA in 2024.
Population estimates, 2000–2024
What are Bremer County, IA’s age demographics?
About 5,200 Bremer County residents are aged 65 and older in 2024. That represents 20.6% of its population. For comparison, the age group represents 18.9% of Iowa’s population and 18% in the US overall.
Another 5,600 Bremer County residents, or 22.1% of the population, were children under 18. For comparison, the age group represents 22.5% of Iowa’s population and 21.6% in the US overall.
A lower share of Bremer County, IA's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Bremer County, IA’s racial and ethnic demographics?
Non-Hispanic white residents make up 93.7% of the Bremer County, IA population, higher than the national share of 57.5%.
In contrast, Bremer County’s Hispanic population accounts for 2.2%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 1.3% 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.
Bremer County, IA has a higher share of a non-Hispanic white population than Iowa as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Bremer County, IA is Waverly with about 10,600 residents in 2024.
Cities and towns in Bremer County, IA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Waverly | 10,576 |
| 2. | Sumner (pt.) | 2,021 |
| 3. | Denver | 1,955 |
| 4. | Tripoli | 1,208 |
| 5. | Janesville (pt.) | 938 |
| 6. | Readlyn | 857 |
| 7. | Plainfield | 392 |
| 8. | Frederika | 206 |
| 9. | Balance of Bremer County | 7,175 |
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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.
