The population of the town of Milledgeville was 18,757 at the 2000 census.
Milledgeville is along the route of the under-construction Fall Line Freeway, an expressway in name only, but still a major Georgia state highway. This highway will link Milledgeville with Augusta, Macon, and Columbus, other Fall Line cities with long histories from Colonial Georgia.
Milledgeville is the principal city of the Milledgeville Micropolitan Statistical Area, a micropolitan area that covers Baldwin and Hancock counties and had a combined population of 54,776 at the 2000 census.
As of the census of 2000, there were 18,757 people, 4,755 households, and 2,643 families residing in the city, although a 2005 study estimates there to be a population of 19,397. The population density was 938.8 people per square mile (362.5/km²). There were 5,356 housing units at an average density of 268.1/sq mi (103.5/km²). The racial makeup of the city was 49.94% White, 47.68% African American, 0.13% Native American, 1.55% Asian, 0.01% Pacific Islander, 0.20% from other races, and 0.50% from two or more races. Hispanic or Latino of any race were 1.23% of the population.
There were 4,755 households out of which 25.9% had children under the age of 18 living with them, 33.6% were married couples living together, 18.7% had a female householder with no husband present, and 44.4% were non-families. 31.7% of all households were made up of individuals and 10.7% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 3.04.
In the city the population was spread out with 16.0% under the age of 18, 20.9% from 18 to 24, 32.3% from 25 to 44, 19.6% from 45 to 64, and 11.2% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 166.0 males. For every 100 females age 18 and over, there were 173.2 males.
The median income for a household in the city was $30,484, and the median income for a family was $44,683. Males had a median income of $30,794 versus $23,719 for females. The per capita income for the city was $12,782. About 14.8% of families and 24.0% of the population were below the poverty line, including 28.8% of those under age 18 and 16.3% of those age 65 or over.