The territorial legislature created Burleigh County on January 4, 1873, annexing territory from Buffalo County. Burleigh was not organized at that time, but the organization was effected on July 16, 1873. Its boundaries were altered in 1879, 1881, 1883, and twice in 1885.[3][4]
The Missouri River flows south-southeasterly along the lower west boundary line of Burleigh County. The central part of the county is drained by south-flowing creeks. The county terrain consists of semi-arid low rolling hills, partially devoted to agriculture.[5] The terrain slopes to the south, and its western portion also slopes to the river valley. The terrain's highest point is on the upper portion of the east boundary line, at 2,060 ft (630 m) ASL.[6] The county has a total area of 1,668 square miles (4,320 km2), of which 1,633 square miles (4,230 km2) is land and 36 square miles (93 km2) (2.1%) is water.[7]
U.S. Decennial Census[9] 1790-1960[10] 1900-1990[11] 1990-2000[12] 2010-2020[1]
2020 census
As of the 2020 census, there were 98,458 people, 39,927 households, and 24,822 families in the county.[13] The population density was 60.3 inhabitants per square mile (23.3/km2) There were 42,692 housing units.
2010 census
As of the 2010 census, there were 81,308 people, 33,976 households, and 21,213 families in the county. The population density was 49.8 inhabitants per square mile (19.2/km2). There were 35,754 housing units at an average density of 21.9 per square mile (8.5/km2). The racial makeup of the county was 93.0% white, 4.2% American Indian, 0.6% black or African American, 0.5% Asian, 0.3% from other races, and 1.4% from two or more races. Those of Hispanic or Latino origin made up 1.2% of the population. In terms of ancestry, 61.0% were German, 21.1% were Norwegian, 8.1% were Russian, 6.8% were Irish, and 2.6% were American.
Of the 33,976 households, 29.0% had children under the age of 18 living with them, 50.2% were married couples living together, 8.7% had a female householder with no husband present, 37.6% were non-families, and 30.5% of all households were made up of individuals. The average household size was 2.31 and the average family size was 2.90. The median age was 37.3 years.
The median income for a household in the county was $53,465 and the median income for a family was $71,103. Males had a median income of $44,944 versus $31,943 for females. The per capita income for the county was $28,784. About 6.3% of families and 9.4% of the population were below the poverty line, including 11.6% of those under age 18 and 11.0% of those age 65 or over.
Burleigh County voters have voted Republican for several decades. With the exception of 1964, no Democratic Party candidate has received even 40 percent of the county's vote after 1940.
United States presidential election results for Burleigh County, North Dakota[14]
