Marion, IA Demographics

A map of Marion's Population by Race

Marion, Iowa has an estimated population of 41,896, a less than 1% change from the 41,535 recorded in the 2020 Census. The population is 87.2% White, 4.9% Multiracial, 2.8% Hispanic, 2.6% Black, 2.1% Asian, and 0.5% Native American/Other. This demographic dot map shows the population of Marion, with one dot drawn for each person counted by the Census, color-coded by race.

Marion is about as racially diverse as it was in the 2020 Census. It is considerably less diverse than Iowa overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Marion, that probability was 23.7% in 2020 and 23.6% in the most recent ACS estimates.

Marion is ranked the 13th most populous place in Iowa, out of 1,026 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Marion was ranked the 13th most populous place in the 2020 Census.

Marion's White Population

36,526 residents of Marion, or 87.2% of the population, identify as White. The share of White residents in Marion is slightly higher than in Iowa overall, where 82.3% of the population is White. Marion ranks 856th statewide in terms of White residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marion's White population has remained roughly the same. White residents' share of Marion's population has remained roughly unchanged at 87.2%.

Marion is more White than neighboring Hiawatha (71.2% White), and Cedar Rapids (77.5% White). Marion is less White than neighboring Robins (94.5% White), Bertram (91.6% White), and Alburnett (99% White).

Marion's Black Population

1,078 residents of Marion, or 2.6% of the population, identify as Black. The share of Black residents in Marion is comparable to the share in Iowa overall, where 3.8% of the population is Black. Marion ranks 64th statewide in terms of Black residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marion's Black population has declined by an estimated 13.7%. Black residents' share of Marion's population has remained roughly unchanged at 2.6%.

Marion is more Black than neighboring Robins (0% Black), Bertram (0% Black), and Alburnett (0% Black). Marion is less Black than neighboring Hiawatha (6.8% Black), and Cedar Rapids (8.5% Black).

Marion's Asian Population

895 residents of Marion, or 2.1% of the population, identify as Asian. The share of Asian residents in Marion is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Marion ranks 57th statewide in terms of Asian residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marion's Asian population has declined by an estimated 1.1%. Asian residents' share of Marion's population has remained roughly unchanged at 2.1%.

Marion is more Asian than neighboring Bertram (0% Asian), and Alburnett (0% Asian). Marion is less Asian than neighboring Robins (2.3% Asian), Hiawatha (7.6% Asian), and Cedar Rapids (2.6% Asian).

Marion's Hispanic Population

1,154 residents of Marion, or 2.8% of the population, identify as Hispanic. The share of Hispanic residents in Marion is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Marion ranks 409th statewide in terms of Hispanic residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marion's Hispanic population has declined by an estimated 11.3%. Hispanic residents' share of Marion's population has remained roughly unchanged at 2.8%.

Marion is more Hispanic than neighboring Robins (1.2% Hispanic), and Alburnett (0% Hispanic). Marion is less Hispanic than neighboring Bertram (4.6% Hispanic), Hiawatha (9.7% Hispanic), and Cedar Rapids (5.2% Hispanic).

Marion's Native American/Other Population

192 residents of Marion, or 0.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Marion is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Marion ranks 411th statewide in terms of Native American/Other residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marion's Native American/Other population has grown by an estimated 12.9%. Native American/Other residents' share of Marion's population has remained roughly unchanged at 0.5%.

Marion is more Native American/Other than neighboring Robins (0% Native American/Other), Bertram (0% Native American/Other), Hiawatha (0.4% Native American/Other), and Alburnett (0% Native American/Other). Marion is less Native American/Other than neighboring Cedar Rapids (0.6% Native American/Other).

Marion's Multiracial Population

2,051 residents of Marion, or 4.9% of the population, identify as Multiracial. The share of Multiracial residents in Marion is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Marion ranks 189th statewide in terms of Multiracial residents as a share of the population, out of 1,026 places.

Since the 2020 Census, Marion's Multiracial population has grown by an estimated 18.1%. Multiracial residents' share of Marion's population has increased from 4.2% to 4.9%.

Marion is more Multiracial than neighboring Robins (1.9% Multiracial), Bertram (3.8% Multiracial), Hiawatha (4.3% Multiracial), and Alburnett (1% Multiracial). Marion is less Multiracial than neighboring Cedar Rapids (5.6% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.