Decatur is a city located in DeKalb County, Georgia. As of the 2000 census, the city had a total population of 18,147. The city is the county seat of DeKalb County6.
As of the census of 2000, there are 18,147 people, 8,051 households, and 3,856 families residing in the city. The population density is 1,676.2/km² (4,343.2/mi²). There are 8,497 housing units at an average density of 784.9/km² (2,033.6/mi²). The racial makeup of the city is 65.61% White, 30.48% African American, 0.16% Native American, 1.64% Asian, 0.03% Pacific Islander, 0.63% from other races, and 1.44% from two or more races. 1.68% of the population are Hispanic or Latino of any race.
There are 8,051 households out of which 22.1% have children under the age of 18 living with them, 32.1% are married couples living together, 13.4% have a female householder with no husband present, and 52.1% are non-families. 39.2% of all households are made up of individuals and 12.9% have someone living alone who is 65 years of age or older. The average household size is 2.13 and the average family size is 2.96.
In the city the population is spread out with 20.0% under the age of 18, 9.1% from 18 to 24, 37.0% from 25 to 44, 20.5% from 45 to 64, and 13.3% who are 65 years of age or older. The median age is 36 years. For every 100 females there are 73.6 males. For every 100 females age 18 and over, there are 68.0 males.
The median income for a household in the city is $47,395, and the median income for a family is $65,064. Males have a median income of $46,817 versus $38,381 for females. The per capita income for the city is $29,363. 11.7% of the population and 7.0% of families are below the poverty line. Out of the total people living in poverty, 15.7% are under the age of 18 and 13.6% are 65 or older.