Jasper County Demographics

A map of Jasper County's Population by Race

Jasper County, Iowa has an estimated population of 37,954, a less than 1% change from the 37,813 recorded in the 2020 Census. The population is 90.8% White, 3.6% Multiracial, 3.1% Hispanic, 1.5% Black, 0.7% Asian, and 0.3% Native American/Other. This demographic dot map shows the population of Jasper County, with one dot drawn for each person counted by the Census, color-coded by race.

Jasper has become slightly more racially diverse since 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 Jasper County, that probability was 16.8% in 2020 and 17.4% in the most recent ACS estimates.

Jasper County is ranked the 17th most populous county in Iowa, out of 99 counties. Jasper County was ranked the 17th most populous county in the 2020 Census.

Jasper County's White Population

34,444 residents of Jasper County, or 90.8% of the population, identify as White. The share of White residents in Jasper County is higher than in Iowa overall, where 82.3% of the population is White. Jasper County ranks 57th statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Jasper County's White population has remained roughly the same. White residents' share of Jasper County's population has remained roughly unchanged at 90.8%.

Jasper County is more White than neighboring Marshall County (66% White), Polk County (73.2% White), Poweshiek County (89.8% White), and Story County (81% White). Jasper County is less White than neighboring Marion County (93.3% White).

Jasper County's Black Population

583 residents of Jasper County, or 1.5% of the population, identify as Black. The share of Black residents in Jasper County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Jasper County ranks 27th statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Jasper County's Black population has declined by an estimated 14.6%. Black residents' share of Jasper County's population has remained roughly unchanged at 1.5%.

Jasper County is more Black than neighboring Marion County (0.4% Black), and Poweshiek County (0.9% Black). Jasper County is less Black than neighboring Marshall County (1.6% Black), Polk County (7.3% Black), and Story County (2.7% Black).

Jasper County's Asian Population

264 residents of Jasper County, or 0.7% of the population, identify as Asian. The share of Asian residents in Jasper County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Jasper County ranks 35th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Jasper County's Asian population has grown by an estimated 22.8%. Asian residents' share of Jasper County's population has remained roughly unchanged at 0.7%.

Jasper County is less Asian than neighboring Marshall County (4.1% Asian), Marion County (1.4% Asian), Polk County (4.9% Asian), Poweshiek County (2% Asian), and Story County (6.6% Asian).

Jasper County's Hispanic Population

1,177 residents of Jasper County, or 3.1% of the population, identify as Hispanic. The share of Hispanic residents in Jasper County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Jasper County ranks 61st statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Jasper County's Hispanic population has grown by an estimated 8.3%. Hispanic residents' share of Jasper County's population has remained roughly unchanged at 3.1%.

Jasper County is more Hispanic than neighboring Marion County (2.3% Hispanic). Jasper County is less Hispanic than neighboring Marshall County (24.6% Hispanic), Polk County (10.4% Hispanic), Poweshiek County (3.5% Hispanic), and Story County (5.2% Hispanic).

Jasper County's Native American/Other Population

105 residents of Jasper County, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Jasper County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Jasper County ranks 26th statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Jasper County's Native American/Other population has declined by an estimated 53.3%. Native American/Other residents' share of Jasper County's population has remained roughly unchanged at 0.3%.

Jasper County is less Native American/Other than neighboring Marshall County (0.6% Native American/Other), Polk County (0.4% Native American/Other), Poweshiek County (0.4% Native American/Other), and Story County (0.5% Native American/Other).

Jasper County's Multiracial Population

1,381 residents of Jasper County, or 3.6% of the population, identify as Multiracial. The share of Multiracial residents in Jasper County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Jasper County ranks 24th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Jasper County's Multiracial population has grown by an estimated 19.3%. Multiracial residents' share of Jasper County's population has increased from 3.1% to 3.6%.

Jasper County is more Multiracial than neighboring Marshall County (3.2% Multiracial), Marion County (2.3% Multiracial), and Poweshiek County (3.3% Multiracial). Jasper County is less Multiracial than neighboring Polk County (3.8% Multiracial), and Story County (4% 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.