Marshall County Demographics

A map of Marshall County's Population by Race

Marshall County, Iowa had a population of 40,105 in 2020. It was 68.4% White, 2.0% Black, 3.8% Asian, 22.8% Hispanic, 0.6% Native American/Other, and 2.5% Multiracial. This map presents the population of Marshall County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Marshall County is the 15th most populous county of the 99 counties in Iowa.

Marshall County's White Population

27,438 residents of Marshall County identify as White, or 68.4%. This makes the White share of the population of Marshall County less than the White share of the population of Iowa (82.7% White). Of the 99 counties in Iowa, Marshall County is ranked #96 in terms of White residents as a share of the population.

Marshall County is less White than neighboring Jasper County (91.1% White), Grundy County (95.6% White), Hardin County (90.6% White), Story County (81.1% White), and Tama County (77.5% White).

Marshall County's Black Population

785 residents of Marshall County identify as Black, or 2.0%. This makes the Black share of the population of Marshall County roughly similar to the Black share of the population of Iowa (4.1% Black). Of the 99 counties in Iowa, Marshall County is ranked #25 in terms of Black residents as a share of the population.

Marshall County is more Black than neighboring Jasper County (1.8% Black), Grundy County (0.3% Black), Hardin County (0.9% Black), and Tama County (0.7% Black). Marshall County is less Black than neighboring Story County (3% Black).

Marshall County's Asian Population

1,514 residents of Marshall County identify as Asian, or 3.8%. This makes the Asian share of the population of Marshall County roughly similar to the Asian share of the population of Iowa (2.4% Asian). Of the 99 counties in Iowa, Marshall County is ranked #6 in terms of Asian residents as a share of the population.

Marshall County is more Asian than neighboring Jasper County (0.6% Asian), Grundy County (0.2% Asian), Hardin County (0.5% Asian), and Tama County (0.5% Asian). Marshall County is less Asian than neighboring Story County (5.5% Asian).

Marshall County's Hispanic Population

9,140 residents of Marshall County identify as Hispanic, or 22.8%. This makes the Hispanic share of the population of Marshall County larger than the Hispanic share of the population of Iowa (6.8% Hispanic). Of the 99 counties in Iowa, Marshall County is ranked #3 in terms of Hispanic residents as a share of the population.

Marshall County is more Hispanic than neighboring Jasper County (2.9% Hispanic), Grundy County (1.2% Hispanic), Hardin County (4.8% Hispanic), Story County (5.1% Hispanic), and Tama County (10.5% Hispanic).

Marshall County's Native American/Other Population

245 residents of Marshall County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.6%. This makes the Native American/Other share of the population of Marshall County roughly similar to the Native American/Other share of the population of Iowa (0.7% Native American/Other). Of the 99 counties in Iowa, Marshall County is ranked #24 in terms of Native American/Other residents as a share of the population.

Marshall County is more Native American/Other than neighboring Grundy County (0.2% Native American/Other), and Hardin County (0.3% Native American/Other). Marshall County is less Native American/Other than neighboring Tama County (7.5% Native American/Other).

Marshall County's Multiracial Population

983 residents of Marshall County identify as Multiracial, or 2.5%. This makes the Multiracial share of the population of Marshall County roughly similar to the Multiracial share of the population of Iowa (3.4% Multiracial). Of the 99 counties in Iowa, Marshall County is ranked #52 in terms of Multiracial residents as a share of the population.

Marshall County is more Multiracial than neighboring Grundy County (2.4% Multiracial). Marshall County is less Multiracial than neighboring Jasper County (3.1% Multiracial), Hardin County (2.8% Multiracial), Story County (4.6% Multiracial), and Tama County (3.2% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.