The Licking River is formed at Newark in Licking County by the confluence of its north and south forks including many other small fishable streams.
The North Fork Licking River, about 35 mi (55 km) long, rises in southwestern Morrow County and initially flows generally east-southeastwardly through Knox County, past Centerburg, into Licking County, where at Utica it turns southwardly and flows past St. Louisville. In Licking County, the North Fork collects the Otter Fork Licking River, which rises in Knox County and flows past Hartford; the Lake Fork Licking River; and the Clear Fork Licking River. The Lake and Clear forks both flow for their entire lengths in Licking County.
The South Fork Licking River, about 30 mi (50 km) long, rises in southwestern Licking County and initially flows southeastwardly past Pataskala and Kirkersville and briefly enters Fairfield County, where it turns northeastwardly back into Licking County and flows past Heath.
Jonathan Chapman (1775-1843), aka Johnny Appleseed, planted his first apple orchard near Licking Creek. He took a load of apple seed from Pennsylvania cider presses into the Territory of Ohio in 1801, according to a Harper magazine article written in November 1871, "Johnny Appleseed - A Pioneer Hero" by W.D. Haley (pp. 830–836).[9][10]