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Sioux City Times

Sunday, October 26, 2025

Census Bureau reports Onawa population was 2,788 in 2020

Webp names 12

Onawa had a population of 2,788 people in 2020, according to U.S. Census Bureau data obtained by the Sioux City Times.

The median age was 43, with 54.4 percent of the total population being female and 45.6 percent male.

The state's total population in 2020 was 3,150,011.

An agency of the U.S. Federal Statistical System, the Census Bureau is responsible for compiling statistical facts about the American people, places and economy. Data for this story was compiled from the bureau’s American Community Survey. Information from the survey helps to determine how federal and state funds are distributed.

Onawa population by sex

Estimated NumberPercent of total population
Male1,27045.6
Female1,51854.4
Total Population2,788100