Jefferson County Demographics

A map of Jefferson County's Population by Race

Jefferson County, Iowa had a population of 15,663 in 2020. It was 85.7% White, 2.6% Black, 3.2% Asian, 3.9% Hispanic, 0.9% Native American/Other, and 3.7% Multiracial. This map presents the population of Jefferson County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Jefferson County is the 48th most populous county of the 99 counties in Iowa.

Jefferson County's White Population

13,425 residents of Jefferson County identify as White, or 85.7%. This makes the White share of the population of Jefferson County roughly similar to the White share of the population of Iowa (82.7% White). Of the 99 counties in Iowa, Jefferson County is ranked #76 in terms of White residents as a share of the population.

Jefferson County is more White than neighboring Wapello County (77% White). Jefferson County is less White than neighboring Van Buren County (95.5% White), Keokuk County (94.4% White), Washington County (88.4% White), and Henry County (86.1% White).

Jefferson County's Black Population

409 residents of Jefferson County identify as Black, or 2.6%. This makes the Black share of the population of Jefferson County roughly similar to the Black share of the population of Iowa (4.1% Black). Of the 99 counties in Iowa, Jefferson County is ranked #17 in terms of Black residents as a share of the population.

Jefferson County is more Black than neighboring Van Buren County (0.4% Black), Keokuk County (0.5% Black), Washington County (0.8% Black), and Henry County (2.4% Black). Jefferson County is less Black than neighboring Wapello County (4.1% Black).

Jefferson County's Asian Population

500 residents of Jefferson County identify as Asian, or 3.2%. This makes the Asian share of the population of Jefferson County roughly similar to the Asian share of the population of Iowa (2.4% Asian). Of the 99 counties in Iowa, Jefferson County is ranked #7 in terms of Asian residents as a share of the population.

Jefferson County is more Asian than neighboring Van Buren County (0.3% Asian), Keokuk County (0.2% Asian), Washington County (0.5% Asian), Henry County (2.2% Asian), and Wapello County (1.8% Asian).

Jefferson County's Hispanic Population

610 residents of Jefferson County identify as Hispanic, or 3.9%. This makes the Hispanic share of the population of Jefferson County roughly similar to the Hispanic share of the population of Iowa (6.8% Hispanic). Of the 99 counties in Iowa, Jefferson County is ranked #40 in terms of Hispanic residents as a share of the population.

Jefferson County is more Hispanic than neighboring Van Buren County (1.6% Hispanic), and Keokuk County (2.1% Hispanic). Jefferson County is less Hispanic than neighboring Washington County (7.1% Hispanic), Henry County (5.3% Hispanic), and Wapello County (12.2% Hispanic).

Jefferson County's Native American/Other Population

136 residents of Jefferson County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.9%. This makes the Native American/Other share of the population of Jefferson 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, Jefferson County is ranked #11 in terms of Native American/Other residents as a share of the population.

Jefferson County is more Native American/Other than neighboring Van Buren County (0.1% Native American/Other), Keokuk County (0.1% Native American/Other), Washington County (0.5% Native American/Other), and Henry County (0.7% Native American/Other). Jefferson County is less Native American/Other than neighboring Wapello County (1.9% Native American/Other).

Jefferson County's Multiracial Population

583 residents of Jefferson County identify as Multiracial, or 3.7%. This makes the Multiracial share of the population of Jefferson County roughly similar to the Multiracial share of the population of Iowa (3.4% Multiracial). Of the 99 counties in Iowa, Jefferson County is ranked #11 in terms of Multiracial residents as a share of the population.

Jefferson County is more Multiracial than neighboring Van Buren County (2.1% Multiracial), Keokuk County (2.7% Multiracial), Washington County (2.7% Multiracial), Henry County (3.2% Multiracial), and Wapello County (3% Multiracial).

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