Lowndes County is part of the Montgomery Metropolitan Statistical Area.
As of the census of 2000, there were 13,473 people, 4,909 households, and 3,588 families residing in the county. The population density was 19 people per square mile (7/km²). There were 5,801 housing units at an average density of 8 per square mile (3/km²). The racial makeup of the county was 73.37% Black or African American, 25.86% White, 0.11% Native American, 0.12% Asian, 0.02% Pacific Islander, 0.12% from other races, and 0.40% from two or more races. 0.63% of the population were Hispanic or Latino of any race.
There were 4,909 households out of which 35.40% had children under the age of 18 living with them, 42.90% were married couples living together, 25.70% had a female householder with no husband present, and 26.90% were non-families. 24.60% of all households were made up of individuals and 9.40% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.28.
In the county the population was spread out with 30.20% under the age of 18, 9.10% from 18 to 24, 27.10% from 25 to 44, 21.40% from 45 to 64, and 12.20% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 87.90 males. For every 100 females age 18 and over, there were 82.90 males.
The median income for a household in the county was $23,050, and the median income for a family was $28,935. Males had a median income of $27,694 versus $20,137 for females. The per capita income for the county was $12,457. About 26.60% of families and 31.40% of the population were below the poverty line, including 41.70% of those under age 18 and 26.60% of those age 65 or over.