History
Chatham was originally called Harrisburgh, and under the latter name was laid out in 1829. A post office was established under the name Chatham in 1836, and remained in operation until 1894.References
Unincorporated communities in Licking County, Ohio 1829 establishments in Ohio Populated places established in 1829 Unincorporated communities in Ohio {{LickingCountyOH-geo-stub