High Quality Content by WIKIPEDIA articles! 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. 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. 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.