city on December 1, 2007, with the first elected officials taking office a few days later. On September 23, 2008, the city was renamed by an ordinance as "Chattahoochee Hills". Subsequent zoning updates have maintained the vision of preservation, but have decoupled the development from specific landowner sites. The end result foreseen by the zoning will permanently protect 70% of the City's land as forest and farm, while consolidating the development on the balance of the City's territory in a variety of hamlet, village and town typologies scattered throughout the preserved land, developed on a 'first come/first served' basis. Land will be conserved through a variety of methods, including preservation internal to developments, as well as external preservation through the sale and purchase of Transferable development rights (TDR's). In 2014 the City responded to community petitions by annexing approximately 5,473 acres to its north along with several hundred residents (from the unincorporated portion of Fulton County), an area which included the original county seat of historic Campbell County, Campbellton. In 2014 the City also annexed approximately 180 acres with no residents in Coweta County at the request of the developer of Serenbe, who had property in both counties. Demographics 2020 census As of the 2020 United States census, there were 2,950 people, 1,106 households, and 786 families residing in the city. 2010 census As of the census of 2010, there were 2,378 people, 941 households, and 679 families residing in the city. The population density was . There were 1,080 housing units at an average density of 21.6 per square mile (8.34/km2). The racial makeup of the city was 68.6% White, 28.0% African American, 0.2% Native American, 0.3% Asian, 1.9% from other races, and 1.0% from two or more races. Hispanic or Latino of any race were 5.6% of the population. There were 941 households, out of which 24.2% had children under the age of 18 living with them, 55.3% were married couples living together, 12.9% had a female householder with no husband present, and 27.8% were non-families. 29.0% of all households were made up of individuals under 18, and 29.1% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 2.95. The population was spread out, with 39.6% under the age of 18, 3.3% from 18 to 21, 56.4% from 22 to 64, and 16.1%