Smith County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 16,491. Its county seat is Raleigh. Smith County is a prohibition or dry county.
According to the U.S. Census Bureau, the county has a total area of 637 square miles (1,650 km), of which 636 square miles (1,650 km) is land and 1.0 square mile (2.6 km) (0.2%) is water.
As of the census of 2000, there were 16,182 people, 6,046 households, and 4,558 families residing in the county. The population density was 25 people per square mile (10/km²). There were 7,005 housing units at an average density of 11 per square mile (4/km²).
The racial makeup of the county was 76.11% White, 23.11% Black or African American, 0.11% Native American, 0.10% Asian, 0.04% Pacific Islander, 0.19% from other races, and 0.35% from two or more races. 0.59% of the population were Hispanic or Latino of any race.
There were 6,046 households out of which 35.90% had children under the age of 18 living with them, 59.60% were married couples living together, 11.90% had a female householder with no husband present, and 24.60% were non-families. 23.00% of all households were made up of individuals and 11.60% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.13.
In the county, the population was spread out with 27.50% under the age of 18, 8.70% from 18 to 24, 27.30% from 25 to 44, 22.60% from 45 to 64, and 13.90% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 95.50 males. For every 100 females age 18 and over, there were 91.60 males.
The median income for a household in the county was $30,840, and the median income for a family was $36,780. Males had a median income of $28,698 versus $20,154 for females. The per capita income for the county was $14,752. About 12.90% of families and 16.90% of the population were below the poverty line, including 22.50% of those under age 18 and 23.70% of those age 65 or over.