Data / Population / Winnebago County

Population in Winnebago County

Population in Winnebago County was 10,251 in 2025, according to the U.S. Census Bureau. That is down 1% from 2024. That is the 71st highest of 99 counties in 2025.

2025, persons10,251
Change on 2024-1%
Rank71st of 99Counties in Iowa ranked
Series high10,6592022
Series low10,2512025

Population in Winnebago County, 2020 to 2025

CSVChart (SVG)

10.2K10.3K10.4K10.5K10.6K10.7K2020202120222023202420252020: 10,653 persons2021: 10,651 persons2022: 10,659 persons2023: 10,539 persons2024: 10,351 persons2025: 10,251 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202510,251
202410,351
202310,539
202210,659
202110,651
202010,653

Compared with Iowa and United States

Place2025
Winnebago County10,251
Iowa3,238,387
United States341,784,857

Rankings

Definition

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Questions

What is the population in Winnebago County?

Population in Winnebago County was 10,251 in 2025, according to the U.S. Census Bureau. That is down 1% from 2024. That is the 71st highest of 99 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved by Invokely on 2026-10-08.

What was the highest population in Winnebago County?

10,659 in 2022, the highest value since 2020 in this series.

More statistics for Winnebago County

All statistics for Winnebago County