Dallas County Demographics

A map of Dallas County's Population by Race

Dallas County, Iowa has an estimated population of 107,968, an increase from the 99,678 recorded in the 2020 Census. The population is 80.9% White, 6.9% Hispanic, 4.9% Asian, 3.9% Multiracial, 3.0% Black, and 0.5% Native American/Other. This demographic dot map shows the population of Dallas County, with one dot drawn for each person counted by the Census, color-coded by race.

Dallas has become more racially diverse since the 2020 Census. It is more 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 Dallas County, that probability was 31.9% in 2020 and 33.6% in the most recent ACS estimates.

Dallas County is ranked the 6th most populous county in Iowa, out of 99 counties. Dallas County was ranked the 7th most populous county in the 2020 Census.

Dallas County's White Population

87,326 residents of Dallas County, or 80.9% of the population, identify as White. The share of White residents in Dallas County is comparable to the share in Iowa overall, where 82.3% of the population is White. Dallas County ranks 82nd statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Dallas County's White population has grown by an estimated 6.9%. White residents' share of Dallas County's population has decreased from 82.0% to 80.9%.

Dallas County is more White than neighboring Polk County (73.2% White). Dallas County is less White than neighboring Madison County (94.3% White), Boone County (92.9% White), Guthrie County (92.4% White), and Greene County (92.3% White).

Dallas County's Black Population

3,187 residents of Dallas County, or 3.0% of the population, identify as Black. The share of Black residents in Dallas County is comparable to the share in Iowa overall, where 3.8% of the population is Black. Dallas County ranks 15th statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Dallas County's Black population has grown by an estimated 19.9%. Black residents' share of Dallas County's population has remained roughly unchanged at 3.0%.

Dallas County is more Black than neighboring Madison County (0.7% Black), Boone County (1.2% Black), Guthrie County (0.6% Black), and Greene County (0.1% Black). Dallas County is less Black than neighboring Polk County (7.3% Black).

Dallas County's Asian Population

5,263 residents of Dallas County, or 4.9% of the population, identify as Asian. The share of Asian residents in Dallas County is slightly higher than in Iowa overall, where 2.5% of the population is Asian. Dallas County ranks 4th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Dallas County's Asian population has grown by an estimated 5.5%. Asian residents' share of Dallas County's population has remained roughly unchanged at 4.9%.

Dallas County is more Asian than neighboring Madison County (0.4% Asian), Boone County (0.2% Asian), Guthrie County (0.5% Asian), and Greene County (0.6% Asian).

Dallas County's Hispanic Population

7,453 residents of Dallas County, or 6.9% of the population, identify as Hispanic. The share of Hispanic residents in Dallas County is comparable to the share in Iowa overall, where 7.3% of the population is Hispanic. Dallas County ranks 24th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Dallas County's Hispanic population has grown by an estimated 14.4%. Hispanic residents' share of Dallas County's population has remained roughly unchanged at 6.9%.

Dallas County is more Hispanic than neighboring Madison County (2.3% Hispanic), Boone County (2.9% Hispanic), Guthrie County (3.1% Hispanic), and Greene County (3.5% Hispanic). Dallas County is less Hispanic than neighboring Polk County (10.4% Hispanic).

Dallas County's Native American/Other Population

548 residents of Dallas County, 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 Dallas County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Dallas County ranks 41st statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Dallas County's Native American/Other population has grown by an estimated 7.7%. Native American/Other residents' share of Dallas County's population has remained roughly unchanged at 0.5%.

Dallas County is more Native American/Other than neighboring Madison County (0.1% Native American/Other), Boone County (0% Native American/Other), Polk County (0.4% Native American/Other), and Greene County (0.3% Native American/Other). Dallas County is less Native American/Other than neighboring Guthrie County (0.9% Native American/Other).

Dallas County's Multiracial Population

4,191 residents of Dallas County, or 3.9% of the population, identify as Multiracial. The share of Multiracial residents in Dallas County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Dallas County ranks 17th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Dallas County's Multiracial population has grown by an estimated 26.9%. Multiracial residents' share of Dallas County's population has increased from 3.3% to 3.9%.

Dallas County is more Multiracial than neighboring Madison County (2.2% Multiracial), Boone County (2.8% Multiracial), Guthrie County (2.5% Multiracial), Polk County (3.8% Multiracial), and Greene County (3.1% 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.