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Sioux City Times

Sunday, October 26, 2025

Census Bureau reports Buena Vista County population was 19,950 in 2020

Webp names 10

Buena Vista County had a population of 19,950 people in 2020, according to U.S. Census Bureau data obtained by the Sioux City Times.

The median age was 34, with 50.4 percent of the total population being female and 49.6 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.

Buena Vista County population by sex

Estimated NumberPercent of total population
Male9,90349.6
Female10,04750.4
Total Population19,950100

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