UPDATE:
Parents have been located.

From the City of Athens, TN:

FOR IMMEDIATE RELEASE: The Athens Police Department has found a young child, approximately 4-5 years in age in the Forrest Hills Area. He is currently safe with officers at the police department, and has been fed. If a parent or family member is searching for this child, please call us immediately at 423-744-2730 – Attention Lieutenant Witt or Patterson.