Chattahoochee Hills (formerly Chattahoochee Hill Country) is a city in southern Fulton County, Georgia, United States. As of the 2010 census, it had a population of 2,378 living in an area of just over . The population in 2019 was estimated to 3,318 in an area of approximately acres after subsequent annexations. It is the incorporated part of a region called "Chattahoochee Hill Country", an area encompassing approximately southwest of Atlanta, bordered on the northwest side by the Chattahoochee River. Unlike the rest of metro Atlanta, it is still relatively undeveloped, and most of its rural character remains unchanged. The majority of the wider area comprises the west-southwest part of southern Fulton, and smaller adjacent parts of southern Douglas, eastern Carroll, and northern Coweta counties. History The area that is now southwest Fulton was originally Campbell County, but it agreed to annexation by neighboring Fulton County on January 1, 1932, to reduce administrative costs. Historically, much of the west/center of the current city was considered the town of Rico, with other communities, including Goodes, Rivertown, County Line, Campbellton, Pumpkintown, and several other historic communities also within the new city's boundaries. The idea of "Chattahoochee Hills" is very recent. This developed from attempts to incorporate all of Fulton County into cities following the 2005 incorporation of Sandy Springs in the north part of the county, as well as local efforts to take control of zoning and land subdivision in the multi-county Chattahoochee Hill Country area. During the 2006 session, the Georgia General Assembly passed a law allowing the Fulton section of the area to incorporate as a city (the only type of municipality allowed in Georgia), the purpose being the municipalization of that county, and to allow local residents to have local control of zoning, with the goal of preserving as much as possible of the rural character of the community while controlling development. Originally, this was to be implemented by concentrating the majority of the development in three planned villages. The nearby city of Palmetto annexed one of the village sites, leaving a gerrymander-looking arm of Palmetto sticking northwest into the heart of the new city. On June 19, 2007, residents voted by an 83% to 17% margin in a local referendum to incorporate the portion within Fulton as the city of "Chattahoochee Hill Country". Later annexation could incorporate the portions remaining in other counties. Chattahoochee Hill Country became a