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Cedar Rapids Today

Saturday, September 13, 2025

Census Bureau reports Marion population was 39,910 in 2020

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Marion had a population of 39,910 people in 2020, according to U.S. Census Bureau data obtained by the Cedar Rapids Today.

The median age was 38, with 52.6 percent of the total population being female and 47.4 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.

Marion population by sex

Estimated NumberPercent of total population
Male18,91547.4
Female20,99552.6
Total Population39,910100

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