The United States Army established a cavalry post at the site of Hargrave, Georgia, an unincorporated town situated next to the Chickamauga National Battlefield. The existing settlement was named for a Confederate soldier, William Hamilton Hargrave, who along with his wife Amelia Cecilia Strange-Hargrave owned most of the land in the area. The couple was well known in the 19th century to travellers heading to Ross's Landing on the Tennessee River from LaFayette, Georgia. William Hargrave and other landowners in the area were forced to sell their property to the Army to be used as a base for the 6th Cavalry. The Chickamauga Post established in 1902 by the U.S. Army was later named Fort Oglethorpe after James Oglethorpe, the founder of the Colony of Georgia. During World War I and World War II, the area served as a war-time induction and processing center, and also housed German prisoners of war. Fort Oglethorpe was a major training center for the Women's Army Corps during World War II. The post land was declared surplus in 1947 and returned to civilian hands, forming the nucleus for a town that was incorporated in 1949.
As of the 2000 U.S. census, there were 6,940 people, 2,873 households, and 1,881 families residing in the city. The population density was 532.6 people per square mile. There were 3,108 housing units at an average density of 238.5 per square mile. The racial makeup of the city was 93.14% White, 2.38% African American, 0.19% Native American, 2.07% Asian, 0.03% Pacific Islander, 0.56% from other races, and 1.63% from two or more races. Hispanic or Latino of any race were 1.41% of the population. There were 2,873 households, out of which 29.3% had children under the age of 18 living with them, 47.0% were married couplesliving together, 15.0% had a female householder with no husband present, and 34.5% were non-families. 30.6% of all households were made up of individuals, and 13.3% had someone living alone who was 65 years of age or older. The average household size was 2.29 and the average family size was 2.86. In the city, the population was spread out, with 22.8% under the age of 18, 9.5% from 18 to 24, 26.3% from 25 to 44, 21.8% from 45 to 64, and 19.6% 65 years of age or older. The median age was 38 years. For every 100 females, there were 82.2 males. For every 100 females age 18 and over, there were 76.9 males. The median income for a household in the city was $32,095, and the median income for a family was $40,643. Males had a median income of $28,160 versus $21,141 for females. The per capita income for the city was $16,288. About 11.5% of families and 17.4% of the population were below the poverty line, including 30.8% of those under age 18 and 11.3% of those age 65 or over.
