Cass County Demographics

A map of Cass County's Population by Race

Cass County, North Dakota has an estimated population of 193,400, an increase from the 184,525 recorded in the 2020 Census. The population is 81.2% White, 7.0% Black, 3.7% Multiracial, 3.6% Hispanic, 3.2% Asian, and 1.4% Native American/Other. 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 is about as racially diverse as it was in the 2020 Census. It is slightly more diverse than North Dakota 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 33.5% in 2020 and 33.2% in the most recent ACS estimates.

Cass County is ranked the most populous county in North Dakota, out of 53 counties. Cass County was ranked the 1st most populous county in the 2020 Census.

Cass County's White Population

157,040 residents of Cass County, or 81.2% of the population, identify as White. The share of White residents in Cass County is comparable to the share in North Dakota overall, where 81.7% of the population is White. Cass County ranks 43rd statewide in terms of White residents as a share of the population, out of 53 counties.

Since the 2020 Census, Cass County's White population has grown by an estimated 5.1%. White residents' share of Cass County's population has remained roughly unchanged at 81.2%.

Cass County is less White than neighboring Traill County (89.3% White), Ransom County (91.8% White), Steele County (94.1% White), Richland County (88.8% White), and Clay County (83.5% White).

Cass County's Black Population

13,485 residents of Cass County, or 7.0% of the population, identify as Black. The share of Black residents in Cass County is slightly higher than in North Dakota overall, where 3.3% of the population is Black. Cass County ranks 1st statewide in terms of Black residents as a share of the population, out of 53 counties.

Since the 2020 Census, Cass County's Black population has grown by an estimated 5.7%. Black residents' share of Cass County's population has remained roughly unchanged at 7.0%.

Cass County is more Black than neighboring Traill County (1% Black), Ransom County (1.1% Black), Steele County (0.2% Black), Richland County (0.8% Black), and Clay County (4.6% Black).

Cass County's Asian Population

6,166 residents of Cass County, or 3.2% of the population, identify as Asian. The share of Asian residents in Cass County is comparable to the share in North Dakota overall, where 1.6% of the population is Asian. Cass County ranks 2nd statewide in terms of Asian residents as a share of the population, out of 53 counties.

Since the 2020 Census, Cass County's Asian population has grown by an estimated 2.2%. Asian residents' share of Cass County's population has remained roughly unchanged at 3.2%.

Cass County is more Asian than neighboring Traill County (0.6% Asian), Ransom County (0.7% Asian), Steele County (0% Asian), Richland County (0.8% Asian), and Clay County (1.6% Asian).

Cass County's Hispanic Population

6,953 residents of Cass County, or 3.6% of the population, identify as Hispanic. The share of Hispanic residents in Cass County is comparable to the share in North Dakota overall, where 4.7% of the population is Hispanic. Cass County ranks 14th statewide in terms of Hispanic residents as a share of the population, out of 53 counties.

Since the 2020 Census, Cass County's Hispanic population has grown by an estimated 12.5%. Hispanic residents' share of Cass County's population has remained roughly unchanged at 3.6%.

Cass County is more Hispanic than neighboring Ransom County (2.7% Hispanic), and Steele County (1.9% Hispanic). Cass County is less Hispanic than neighboring Traill County (4% Hispanic), Richland County (3.8% Hispanic), and Clay County (5% Hispanic).

Cass County's Native American/Other Population

2,684 residents of Cass County, or 1.4% 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 slightly lower than in North Dakota overall, where 4.7% of the population is Native American/Other. Cass County ranks 24th statewide in terms of Native American/Other residents as a share of the population, out of 53 counties.

Since the 2020 Census, Cass County's Native American/Other population has declined by an estimated 7.6%. Native American/Other residents' share of Cass County's population has remained roughly unchanged at 1.4%.

Cass County is more Native American/Other than neighboring Traill County (1.3% Native American/Other), Ransom County (0.3% Native American/Other), Steele County (0.8% Native American/Other), and Clay County (1% Native American/Other). Cass County is less Native American/Other than neighboring Richland County (2.6% Native American/Other).

Cass County's Multiracial Population

7,072 residents of Cass County, or 3.7% of the population, identify as Multiracial. The share of Multiracial residents in Cass County is comparable to the share in North Dakota overall, where 4% of the population is Multiracial. Cass County ranks 12th statewide in terms of Multiracial residents as a share of the population, out of 53 counties.

Since the 2020 Census, Cass County's Multiracial population has declined by an estimated 1.8%. Multiracial residents' share of Cass County's population has remained roughly unchanged at 3.7%.

Cass County is more Multiracial than neighboring Ransom County (3.4% Multiracial), Steele County (3% Multiracial), and Richland County (3.3% Multiracial). Cass County is less Multiracial than neighboring Traill County (4% Multiracial), and Clay County (4.4% 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.