Athens is the largest city in, and the county seat of, Athens County, Ohio, United States. It is located along the Hocking River in the southeastern part of Ohio. A historic college town, Athens is home to Ohio University and is the principal city of the Athens, Ohio Micropolitan Statistical Area. The official population of Athens in the 2010 U.S. Census was 23,832.
Athens is a qualified Tree City USA as recognized by the National Arbor Day Foundation.
The Mound Builders were groups of Native Americans who built large earthen mounds along the Mississippi and Ohio River Tributary Systems. Together these groups left behind thousands of mounds in the eastern United States. While these groups were spread out throughout this region, some lived in and around Athens, Ohio, from about 1000 B.C. to A.D. 700, producing over two hundred mounds in Athens County alone. The Mound Builders of Ohio are separated into two overlapping chronological groups: the builders of effigy mounds, the Adena culture, c. 1000 B.C. to A.D. 200; and the builders of burial mounds, the Hopewell, c. 300 B.C. to A.D. 700.