High Quality Content by WIKIPEDIA articles! The Chattahoochee-Oconee National Forest in northern Georgia comprises two United States National Forests, the Oconee National Forest and Chattahoochee National Forest. The combined total area of the Chattahoochee-Oconee National Forest is 865,855 acres (3,504 km2), of which the Chattahoochee National Forest comprises 750,502 acres (3,037 km2) and the Oconee National Forest comprises 115,353 acres (467 km2). The county with the largest portion of the forest is Rabun County, Georgia, which has 148,684 acres (601.7 km2) within its boundaries.