Cass County's 2026 population is estimated at 204,317, reflecting a 1.25% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Cass County is the largest county in North Dakota. The 2010 population was 150,321 and has grown 35.92% since 2010.
Overall: 32.8 years
Female: 32.6 years
Male: 33 years
There are 150,500 adults, (25,154 of whom are seniors) in Cass County.
Female: 95,353 (49.3%)
Male: 98,047 (50.7%)
The racial composition of Cass County includes 82.33% White, 6.98% Black or African American, 3.22% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 159,233 | 82.33% |
| Black or African American | 13,496 | 6.98% |
| Two or more races | 10,258 | 5.3% |
| Asian | 6,219 | 3.22% |
| Other race | 2,309 | 1.19% |
| Native American | 1,881 | 0.97% |
| Native Hawaiian or Pacific Islander | 4 | 0% |
Cass County 's average per capita income is $53,389. Household income levels show a median of $75,555. The poverty rate stands at 11%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $124,748 | $159,617 |
| Families | $109,848 | $140,593 |
| Households | $75,555 | $103,789 |
| Non Families | $47,253 | $60,583 |
Average Income
Median Household Income
Poverty Rate