According to the U.S. Census Bureau, the county has a total area of 710 square miles (1,800 km2), of which 706 square miles (1,830 km2) is land and 3.6 square miles (9.3 km2) (0.5%) is water.[4]
U.S. Decennial Census[6] 1790-1960[7] 1900-1990[8] 1990-2000[9] 2010-2013[10]
2020 census
Marshall County, Mississippi – Racial and ethnic composition Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
At the 2000 census,[14] there were 34,993 people, 12,163 households and 9,110 families living in the county. The population density was 50 inhabitants per square mile (19/km2). There were 13,252 housing units at an average density of 19 per square mile (7.3/km2). The racial makeup of the county was 50.36% Black or African American, 48.37% White, 0.17% Native American, 0.11% Asian, 0.01% Pacific Islander, 0.37% from other races, and 0.62% from two or more races. 1.21% of the population were Hispanic or Latino of any race.
There were 12,163 households, of which 34.30% had children under the age of 18 living with them, 49.60% were married couples living together, 20.10% had a female householder with no husband present, and 25.10% were non-families. 22.00% of all households were made up of individuals, and 7.90% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.19.
Age distribution was 26.60% under the age of 18, 11.80% from 18 to 24, 28.60% from 25 to 44, 22.00% from 45 to 64, and 11.10% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 98.00 males. For every 100 females age 18 and over, there were 96.50 males.
The median household income was $28,756, and the median family income was $33,125. Males had a median income of $28,852 versus $21,227 for females. The per capita income for the county was $14,028. About 18.00% of families and 21.90% of the population were below the poverty line, including 28.70% of those under age 18 and 23.10% of those age 65 or over.
Communities
City
Holly Springs (county seat and largest municipality)
Democratic presidential candidates carried the county in every election since 1976, until the 2024 election, when it was won by Republican Donald Trump. The smallest percentage margin was in 2020, when Joe Biden won the county by 3.1% over incumbent Donald Trump.
United States presidential election results for Marshall County, Mississippi[15]