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 32,000 acres. It is the incorporated part of a region called "Chattahoochee Hill Country," an area encompassing approximately 60,000 acres (240 km²) 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.