Cass County Demographics

A map of Cass County's Population by Race

Cass County, Iowa has an estimated population of 13,096, a less than 1% change from the 13,127 recorded in the 2020 Census. The population is 93.5% White, 2.7% Hispanic, 1.6% Multiracial, 0.9% Black, 0.8% Native American/Other, and 0.5% Asian. This demographic dot map shows the population of Cass County, with one dot drawn for each person counted by the Census, color-coded by race.

Cass 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 Cass County, that probability was 11.8% in 2020 and 12.5% in the most recent ACS estimates.

Cass County is ranked the 58th most populous county in Iowa, out of 99 counties. Cass County was ranked the 58th most populous county in the 2020 Census.

Cass County's White Population

12,244 residents of Cass County, or 93.5% of the population, identify as White. The share of White residents in Cass County is considerably higher than in Iowa overall, where 82.3% of the population is White. Cass County ranks 23rd statewide in terms of White residents as a share of the population, out of 99 counties.

Since the 2020 Census, Cass County's White population has remained roughly the same. White residents' share of Cass County's population has remained roughly unchanged at 93.5%.

Cass County is more White than neighboring Montgomery County (92% White), Adair County (93.1% White), and Shelby County (91.3% White). Cass County is less White than neighboring Audubon County (93.8% White), and Adams County (94.5% White).

Cass County's Black Population

118 residents of Cass County, or 0.9% of the population, identify as Black. The share of Black residents in Cass County is slightly lower than in Iowa overall, where 3.8% of the population is Black. Cass County ranks 91st statewide in terms of Black residents as a share of the population, out of 99 counties.

Since the 2020 Census, Cass County's Black population has grown by an estimated 321.4%. Black residents' share of Cass County's population has increased from 0.2% to 0.9%.

Cass County is more Black than neighboring Audubon County (0.5% Black), Adams County (0.3% Black), and Shelby County (0.3% Black). Cass County is less Black than neighboring Montgomery County (1.8% Black), and Adair County (1.4% Black).

Cass County's Asian Population

68 residents of Cass County, or 0.5% of the population, identify as Asian. The share of Asian residents in Cass County is comparable to the share in Iowa overall, where 2.5% of the population is Asian. Cass County ranks 80th statewide in terms of Asian residents as a share of the population, out of 99 counties.

Since the 2020 Census, Cass County's Asian population has grown by an estimated 94.3%. Asian residents' share of Cass County's population has remained roughly unchanged at 0.5%.

Cass County is more Asian than neighboring Audubon County (0.1% Asian), Adams County (0% Asian), and Adair County (0.3% Asian). Cass County is less Asian than neighboring Montgomery County (1.1% Asian).

Cass County's Hispanic Population

357 residents of Cass County, or 2.7% of the population, identify as Hispanic. The share of Hispanic residents in Cass County is slightly lower than in Iowa overall, where 7.3% of the population is Hispanic. Cass County ranks 75th statewide in terms of Hispanic residents as a share of the population, out of 99 counties.

Since the 2020 Census, Cass County's Hispanic population has grown by an estimated 16.7%. Hispanic residents' share of Cass County's population has remained roughly unchanged at 2.7%.

Cass County is more Hispanic than neighboring Audubon County (2.5% Hispanic), Montgomery County (0.8% Hispanic), and Adams County (1.7% Hispanic). Cass County is less Hispanic than neighboring Adair County (3.2% Hispanic), and Shelby County (4.4% Hispanic).

Cass County's Native American/Other Population

106 residents of Cass County, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Cass County is comparable to the share in Iowa overall, where 0.6% of the population is Native American/Other. Cass County ranks 10th statewide in terms of Native American/Other residents as a share of the population, out of 99 counties.

Since the 2020 Census, Cass County's Native American/Other population has declined by an estimated 13.8%. Native American/Other residents' share of Cass County's population has remained roughly unchanged at 0.8%.

Cass County is more Native American/Other than neighboring Adams County (0.3% Native American/Other), Adair County (0.7% Native American/Other), and Shelby County (0.5% Native American/Other). Cass County is less Native American/Other than neighboring Audubon County (1.1% Native American/Other), and Montgomery County (1.1% Native American/Other).

Cass County's Multiracial Population

203 residents of Cass County, or 1.6% of the population, identify as Multiracial. The share of Multiracial residents in Cass County is comparable to the share in Iowa overall, where 3.5% of the population is Multiracial. Cass County ranks 56th statewide in terms of Multiracial residents as a share of the population, out of 99 counties.

Since the 2020 Census, Cass County's Multiracial population has declined by an estimated 36.2%. Multiracial residents' share of Cass County's population has decreased from 2.4% to 1.6%.

Cass County is more Multiracial than neighboring Adair County (1.4% Multiracial). Cass County is less Multiracial than neighboring Audubon County (2.1% Multiracial), Montgomery County (3.2% Multiracial), Adams County (3.2% Multiracial), and Shelby County (3% 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.