Calhoun is a city in Gordon County, Georgia, United States. The population was 10,667 at the 2000 census. The city's rapid growth is evident as the population rose to 13,570 in 2005. The city is the county seat of Gordon County. According to the United States Census Bureau, the city has a total area of 30.2 km² (11.7 mi²). 30.2 km² (11.6 mi²) of it is land and 0.1 km² (0.04 mi²) of it (0.17%) is water.

As of the census of 2000, there were 10,667 people, 4,049 households, and 2,672 families residing in the city. The population density was 353.5/km² (915.4/mi²). There were 4,298 housing units at an average density of 142.4/km² (368.8/mi²). The racial makeup of the city was 77.91% White, 7.56% African American, 0.42% Native American, 1.00% Asian, 0.14% Pacific Islander, 11.61% from other races, and 1.36% from two or more races. 17.07% of the population was Hispanic or Latino of any race.