Cass County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 184,525, making it the most populous county in North Dakota, and was estimated to be 200,945 in 2024, almost twice the population of Burleigh County, the second most populated county in the state. It contains over 25.23% of the state's population. The county seat is Fargo, the state's most populous city. 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.
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 (1810âÂÂ1888). Its boundaries were altered in 1875, and in 1961.
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 largest county in North Dakota by total area.
Cass County has the following lakes:
As of the fourth quarter of 2024, the median home value in Cass County was $301,108.
As of the 2023 American Community Survey, there are 81,668 estimated households in Cass County with an average of 2.24 persons per household. The county has a median household income of $75,023. Approximately 9.7% of the county's population lives at or below the poverty line. Cass County has an estimated 75.8% employment rate, with 43.3% of the population holding a bachelor's degree or higher and 95.8% holding a high school diploma.
The top five reported ancestries (people were allowed to report up to two ancestries, 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%).
Cass County, North Dakota â racial and ethnic composition<br><small></small>
As of the 2024 estimate, there were 200,945 people and 81,668 households residing in the county. There were 92,465 housing units at an average density of . The racial makeup of the county was 85.3% White (82.2% NH White), 7.3% African American, 1.7% Native American, 3.2% Asian, 0.1% Pacific Islander, _% from some other races and 2.5% from two or more races. Hispanic or Latino people of any race were 3.8% of the population.
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 82.0% White, 7.0% Black or African American, 1.4% American Indian and Alaska Native, 3.3% Asian, 1.1% from some other race, and 5.1% from two or more races. Hispanic or Latino residents of any race comprised 3.4% of the population.
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 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 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%.
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.
Of the 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.
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.
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.
School districts include:
K-12:
Elementary:
Former districts: