Cass County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 184,525, and was estimated to be 201,794 in 2025, making it the most populous county in North Dakota, almost twice the population of Burleigh County, the second most populated county in the state. The county seat and the largest city is Fargo, the most populous city in North Dakota and the 216th-most populous city in the United States. It contains over 25.24% of the state's population.Based on the 2024 Estimate: 201,794 / 799,358 (ND pop.) = 25.24% The county is named for George Washington Cass, president of the Northern Pacific Railway from 1872 to 1875. It is the only Cass County in the United States that is not named after Lewis Cass.
Cass County is part of the Fargo, ND-Moorhead, MN Metropolitan Statistical Area.
History Cass County was defined by action of the Dakota Territory legislature on January 4, 1873, and its organization was affected on October 27 of that year. It was named for railroad executive George Washington Cass (1810–1888). Its boundaries were altered in 1875, and in 1961.
Geography Cass County lies on the east side of North Dakota. Its east boundary line abuts the west boundary line of the state of Minnesota across the river. The Red River flows northward along the county's east boundary, on its way to Lake Winnipeg and Hudson Bay. The county's terrain consists of low rolling hills, devoted to agriculture except around developed areas. Its terrain slopes to the north and east, with its highest point on the southwestern corner at ASL.
According to the United States Census Bureau, the county has a total area of , of which is land and (0.16%) is water. It is the 10th-county in North Dakota by total area.
Major highways
Interstate 29 Interstate 94 U.S. Highway 10 U.S. Highway 52 U.S. Highway 81 North Dakota Highway 10 North Dakota Highway 18 North Dakota Highway 38 North Dakota Highway 46 North Dakota Highway 294
Transit Amtrak Empire Builder (Fargo station) Jefferson Lines MATBUS
Adjacent counties
Traill County - north Norman County, Minnesota - northeast Clay County, Minnesota - east Richland County - southeast Ransom County - southwest Barnes County - west Steele County - northwest
Lakes Cass County has the following lakes: Brewer Lake Lake Bertha
Demographics
As of the third quarter of 2025, the median home value in Cass County was $315,841.
As of the 2024 American Community Survey, there are 90,427 estimated households in Cass County with an average of 2.15 persons per household. The county has a median household income of $76,056. Approximately 12.4% of the county's population lives at or below the poverty line. Cass County has an estimated 71.9% employment rate, with 42.5% of the population holding a bachelor's degree or higher and 95.0% holding a high school diploma. There were 92,455 housing units at an average density of .
The top five reported languages (people were allowed to report up to two languages, thus the figures will generally add to more than 100%) were English (92.7%), Spanish (0.3%), Indo-European (0.2%), Asian and Pacific Islander (0.0%), and Other (6.7%).
The median age in the county was 33.7 years.
+Cass County, North Dakota – racial and ethnic composition Race / ethnicity (NH = non-Hispanic) Pop. 1980 Pop. 1990 Pop. 2000 Pop. 2010 Pop. 2024 White alone (NH) 86,522(98.05%) 99,986(97.19%) 116,263(94.42%) 135,530(90.49%) 149,442(80.99%) 162,413(80.82%) Black or African American alone (NH) 141(0.16%) 274(0.27%) 978(0.79%) 3,372(2.25%) 12,761(6.92%) 15,652(7.79%) Native American or Alaska Native alone (NH) 501(0.57%) 918(0.89%) 1,277(1.04%) 1,681(1.12%) 2,367(1.28%) 2,780(1.38%) Asian alone (NH) 392(0.44%) 973(0.95%) 1,543(1.25%) 3,524(2.35%) 6,034(3.27%) 7,555(3.76%) Pacific Islander alone (NH) — — 42(0.03%) 49(0.03%) 79(0.04%) 64(0.03%) Other race alone (NH) 176(0.20%) 23(0.02%) 96(0.08%) 140(0.09%) 459(0.25%) — Mixed race or multiracial (NH) — — 1,421(1.15%) 2,467(1.65%) 7,201(3.90%) 4,703(2.34%) Hispanic or Latino (any race) 515(0.58%) 700(0.68%) 1,518(1.23%) 3,015(2.01%) 6,182(3.35%) 7,778(3.87%) Total 88,247(100.00%) 102,874(100.00%) 123,138(100.00%) 149,778(100.00%) 184,525(100.00%) 200,945(100.00%)
2024 estimate As of the 2024 estimate, there were 200,945 people, 90,427 households, and _ families residing in the county. The population density was . There were 92,455 housing units at an average density of . The racial makeup of the county was 84.06% White, 7.92% African American, 1.61% Native American, 3.81% Asian, 0.05% Pacific Islander, _% from some other races and 2.54% from two or more races. Hispanic or Latino people of any race were 3.87% of the population.
2020 census As of the 2020 census, there were 184,525 people, 78,672 households, and 42,849 families residing in the county. The population density was . There were 85,397 housing units at an average density of . The racial makeup of the county was 82.00% White, 7.03% African American, 1.42% Native American, 3.29% Asian, 0.05% Pacific Islander, 1.08% from some other races and 5.14% from two or more races. Hispanic or Latino people of any race were 3.35% of the population.
There were 78,672 households in the county, of which 27.7% had children under the age of 18 living with them and 26.3% had a female householder with no spouse or partner present. About 35.0% of all households were made up of individuals and 9.0% had someone living alone who was 65 years of age or older.
Of the residents, 22.5% were under the age of 18 and 12.5% were 65 years of age or older; the median age was 33.4 years. For every 100 females there were 102.2 males, and for every 100 females age 18 and over there were 101.4 males.
There were 85,397 housing units, 7.9% were vacant. Among occupied housing units, 51.2% were owner-occupied and 48.8% were renter-occupied. The homeowner vacancy rate was 1.5% and the rental vacancy rate was 10.0%.
2010 census As of the 2010 census, there were 149,778 people, 63,899 households, and 35,215 families in the county. The population density was . There were 67,938 housing units at an average density of . The racial makeup of the county was 91.67% White, 2.29% African American, 1.22% Native American, 2.36% Asian, 0.03% Pacific Islander, 0.53% from some other races and 1.89% from two or more races. Hispanic or Latino people of any race were 2.01% of the population.
In terms of ancestry, 45.4% were German, 35.8% were Norwegian, 9.2% were Irish, 6.3% were Swedish, and 1.7% were American.
There were 63,899 households, 27.8% had children under the age of 18 living with them, 42.9% were married couples living together, 8.3% had a female householder with no husband present, 44.9% were non-families, and 33.0% of all households were made up of individuals. The average household size was 2.27 and the average family size was 2.94. The median age was 31.5 years.
The median income for a household in the county was $47,600 and the median income for a family was $68,858. Males had a median income of $42,557 versus $31,916 for females. The per capita income for the county was $28,184. About 5.8% of families and 12.8% of the population were below the poverty line, including 11.0% of those under age 18 and 10.1% of those age 65 or over.
Population by decade
Government County Commissioners Cass County is governed by a board of commissioners elected to four-year terms. Other elected officials include the sheriff and state's attorney. Appointed officials include administrator, extension agent, director of tax equalization, finance auditor, highway engineer, human services officer, information technology coordinator, recorder, veterans service officer, and weed control officer.
District Commissioner Assumed office Current term ends 1st Tim Flakoll (Vice Chair) 2024 2028 2nd Tony Grindberg (Chair) 2022 2026 3rd Jim Kapitan 2020 2024 4th Duane Breitling 2018 2026 5th Joel Vettel 2024 2028
The current Sheriff is Jesse F. Jahner. Jahner has served as Sheriff of Cass County since January 2, 2019.
The voters of Cass County have historically tended to vote Republican. As recently as the 2004 presidential election, George W. Bush carried Cass County with nearly 60 percent of the vote. However, in recent elections, the county has become more politically diverse and competitive, particularly in Fargo. In 2008, Democratic candidate Barack Obama won the majority of votes in Cass County, with a voting percentage very close to the percentage Obama received in the entire nation, while John McCain won the majority of votes in North Dakota. Mitt Romney's winning margin in 2012 over Obama in Cass County was 49.9% to 47%, while Donald Trump received 49.3% of votes in 2016 (52.69% in 2024), compared to 38.8% for Hillary Clinton and 11.9% for third-party candidates. In 2018, Democratic Senator Heidi Heitkamp achieved a 14-point lead in Eastern North Dakota, although the state as a whole soundly elected Republican Kevin Cramer.
In the North Dakota Legislative Assembly, Fargo falls into 9 districts: 10th, 11th, 16th, 21st, 27th, 41st and 44th-46th. In the House, it's represented by 7 Democrats and 11 Republicans, in Senate by 4 Democrats and 5 Republicans.
Communities Cities
Alice Amenia Argusville Arthur Ayr Briarwood Buffalo Casselton Davenport Enderlin Fargo (county seat) Frontier Gardner Grandin Harwood Horace Hunter Kindred Leonard Mapleton North River Oxbow Page Prairie Rose Reile's Acres Tower City West Fargo
Census-designated places
Brooktree Park Embden Erie Wheatland
Unincorporated communities Absaraka Chaffee Durbin Everest Hickson Lynchburg Prosper Wild Rice
Townships
Addison Amenia Arthur Ayr Barnes Bell Berlin Buffalo Casselton Clifton Cornell Davenport Dows Durbin Eldred Empire Erie Everest Fargo Gardner Gill Gunkel Harmony Harwood Highland Hill Howes Hunter Kinyon Lake Leonard Maple River Mapleton Noble Normanna Page Pleasant Pontiac Raymond Reed Rich Rochester Rush River Stanley Tower Walburg Warren Watson Wheatland Wiser
Education School districts include: - Text list
K-12:
Central Cass Public School, District 17, Casselton Enderlin Area Public School, District 24, Enderlin Fargo Public Schools, District 1, Fargo Hope-Page Public Schools, District 85, Page Kindred Public School, District 2, Kindred Northern Cass Public School, District 97, Hunter Maple Valley Public School, District 4, Tower City May-Port CG Public School, District 14, Mayville West Fargo Public Schools, District 6, West Fargo
Elementary: Mapleton Public School, District 7, Mapleton
See also National Register of Historic Places listings in Cass County, North Dakota
References
External links Cass County – official website Cass County maps, Sheet 1 (northern) and Sheet 2 (southern), North Dakota DOT