Demographics of Cass County, North Dakota

Cass County, North Dakota had 201,794 people on July 1, 2025, by the Census Bureau’s estimate: +16,897 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Cass County, in four figures

201,794
Population: July 1, 2025, Vintage 2025 estimate.; +9.1%
Change since July 2020: +16,897 people.; 32.8 ±0.2
Median age: ACS 2020–⁠2024.; $75,555 ±$2,103
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Cass County, North Dakota's population grew 9.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Cass County, North Dakota's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Cass County, North Dakota's population grew 9.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Cass County, North Dakota's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	184,897	100.0	100.0
2021	189,328	102.4	100.2
2022	193,289	104.5	100.7
2023	197,325	106.7	101.6
2024	199,271	107.8	102.5
2025	201,794	109.1	103.1

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Population of Cass County, North Dakota on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	184,897	+364	+208	+17	+77
2021	189,328	+4,431	+1,094	+231	+3,224
2022	193,289	+3,961	+1,004	+1,227	+1,691
2023	197,325	+4,036	+1,129	+1,284	+1,602
2024	199,271	+1,946	+1,045	+1,481	−565
2025	201,794	+2,523	+1,065	+1,099	+345

Age, 2020–2024

The median age is 32.8 ±0.2: for men 33.0 ±0.3 and for women 32.6 ±0.2. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Cass County by age, ACS 2020–2024
Age	People	Share	North Dakota	United States
Under 5	12,122 ±69	6.3% ±<0.1	6.3% ±0.1	5.6% ±<0.1
5 to 17	30,778 ±1,038	15.9% ±0.5	17.2% ±0.3	16.3% ±<0.1
18 to 24	28,512 ±1,307	14.7% ±0.7	11.1% ±0.3	9.1% ±<0.1
25 to 44	59,092 ±1,063	30.6% ±0.5	27.4% ±0.3	26.9% ±<0.1
45 to 64	37,742 ±916	19.5% ±0.5	21.5% ±0.2	24.8% ±<0.1
65 and over	25,154 ±993	13.0% ±0.5	16.5% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $75,555 ±$2,103, and income per person $45,643 ±$1,146, in 2024 dollars. The median is $76,657 ±$1,163 in North Dakota and $80,734 ±$166 in the United States.

Households by income

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Households in Cass County by income, ACS 2020–2024
Household income	Households	Share	North Dakota	United States
Under $25,000	11,375 ±1,018	13.6% ±1.2	14.4% ±0.5	14.6% ±<0.1
$25,000 to $49,999	16,199 ±1,131	19.3% ±1.3	17.9% ±0.6	16.7% ±<0.1
$50,000 to $74,999	14,073 ±1,107	16.8% ±1.3	16.6% ±0.5	15.5% ±<0.1
$75,000 to $99,999	11,529 ±799	13.7% ±0.9	13.9% ±0.4	12.6% ±<0.1
$100,000 to $149,999	14,872 ±1,045	17.7% ±1.2	18.6% ±0.6	17.5% ±<0.1
$150,000 to $199,999	7,045 ±698	8.4% ±0.8	9.0% ±0.4	9.6% ±<0.1
$200,000 or more	8,852 ±756	10.5% ±0.9	9.6% ±0.4	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Cass County by age, ACS 2020–2024
Age	Below poverty	Rate	North Dakota	United States
All ages	20,571 ±2,200	11.0% ±1.2	10.8% ±0.4	12.5% ±0.1
Under 18	5,016 ±875	11.8% ±2.0	11.1% ±0.7	16.1% ±0.1
18 to 59	13,121 ±1,371	11.8% ±1.2	11.2% ±0.4	11.6% ±0.1
60 and over	2,434 ±418	7.3% ±1.2	9.5% ±0.5	11.0% ±<0.1

Housing, 2020–2024

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Housing in Cass County, ACS 2020–2024
Measure	Cass County	North Dakota	United States
Housing units	89,038 ±84	377,281 ±282	143,775,355 ±10,234
Occupied	94.3% ±0.8	87.7% ±0.4	89.9% ±0.1
Vacant	5.7% ±0.8	12.3% ±0.4	10.1% ±0.1
Owner occupied	52.0% ±1.1	62.9% ±0.6	65.2% ±0.3
Renter occupied	48.0% ±1.3	37.1% ±0.7	34.8% ±0.1
Median home value	$298,000 ±$7,012	$249,900 ±$2,909	$332,700 ±$236
Median gross rent	$958 ±$17	$954 ±$11	$1,413 ±$2
Median year built	1993 ±2	1982 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Cass County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	North Dakota	United States
Hispanic or Latino	6,953 ±0	3.6% ±<0.1	4.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	157,040 ±587	81.2% ±0.3	81.7% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	13,485 ±562	7.0% ±0.3	3.3% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	6,166 ±403	3.2% ±0.2	1.6% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1,697 ±249	0.9% ±0.1	4.2% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 14	0% to < 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	983 ±444	0.5% ±0.2	0.3% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	7,072 ±848	3.7% ±0.4	4.0% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Cass County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	North Dakota	United States
Born in the state	104,153 ±1,992	53.9% ±1.0	61.4% ±0.4	57.3% ±<0.1
Born in another state	72,578 ±2,040	37.5% ±1.1	32.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	1,800 ±446	0.9% ±0.2	1.1% ±0.1	1.7% ±<0.1
Born abroad	14,869 ±1,023	7.7% ±0.5	4.7% ±0.2	14.1% ±<0.1
Naturalized citizens	6,271 ±842	3.2% ±0.4	1.9% ±0.1	7.4% ±<0.1
Not citizens	8,598 ±1,088	4.4% ±0.6	2.8% ±0.2	6.8% ±<0.1

Cass County among the counties of North Dakota

1st of 53 by population, July 2025. Every one is listed on the North Dakota page.

Counties of North Dakota near Cass County in population, July 2025
County	July 2025	Change since 2020
Cass County	201,794	+9.1%
Burleigh County	103,251	+4.7%
Grand Forks County	74,501	+1.9%
Ward County	68,233	−2.4%
Williams County	41,767	+1.4%
Morton County	34,601	+3.8%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026