The Minnesota legislature created the county on February 25, 1879, with territory partitioned from the southern half ofKittson County, withWarren (which was first platted that same year) as the county seat. It was named forWilliam Rainey Marshall, who served as Minnesota governor from 1866 to 1870.[4]
Marshall County lies on Minnesota's border withNorth Dakota (across theRed River, which flows north along the county's western border). TheSnake River rises inPolk County and flows north through the western part of the county to its confluence with the Red. TheTamarac River rises in Marshall County and flows west through the county's northern area to its confluence with the Red. TheMiddle River also rises in Marshall County and flows west through the southern part of the county, discharging into the Snake just upstream of the Snake/Red confluence. The county terrain consists of low rolling hills, carved with drainages, completely devoted to agriculture where possible.[5] The terrain slopes to the west and north, with its highest point near the midpoint of its eastern border, at 1,194 ft (364 m) ASL.[6] The county has an area of 1,813 square miles (4,700 km2), of which 1,775 square miles (4,600 km2) is land and 38 square miles (98 km2) (2.1%) is water.[7] Marshall is one of 17 Minnesota savanna region counties where savanna soils predominate. The true high point is in the northeast of the county: CalTopo displays 1237 ft at 48.5339°N, -96.0167°W
Soils of Marshall County[8]Soils of Old Mill State Park
As of thecensus of 2000, there were 10,155 people, 4,101 households and 2,837 families in the county. Thepopulation density was 5.72 per square mile (2.21/km2). There were 4,791 housing units at an average density of 2.70 per square mile (1.04/km2). The racial makeup of the county was 97.22%White, 0.10%Black orAfrican American, 0.29%Native American, 0.17%Asian, 1.62% fromother races, and 0.60% from two or more races. 2.93% of the population wereHispanic orLatino of any race. 43.2% were ofNorwegian, 12.1%Polish, 11.7%German and 9.6%Swedish ancestry.
There were 4,101 households, of which 30.20% had children under the age of 18 living with them, 60.20% weremarried couples living together, 5.40% had a female householder with no husband present, and 30.80% were non-families. 28.70% of all households were made up of individuals, and 15.10% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 3.01.
The county population contained 25.40% under the age of 18, 6.70% from 18 to 24, 24.70% from 25 to 44, 24.70% from 45 to 64, and 18.50% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 103.20 males. For every 100 females age 18 and over, there were 102.10 males.
The median household income was $34,804, and the median family income was $41,908. Males had a median income of $30,051 versus $20,600 for females. Theper capita income for the county was $16,317. About 6.90% of families and 9.80% of the population were below thepoverty line, including 11.30% of those under age 18 and 12.80% of those age 65 or over.
Marshall County has voted Republican in presidential elections since 2000, except in 2008, whenBarack Obama won the county by 26 votes, or less than one percentage point. In 2024,Donald Trump became the first Republican to reach three-quarters of the county's vote sinceWarren G. Harding in 1920.[15]
United States presidential election results for Marshall County, Minnesota[16]