Akin, IllinoisAkin is an unincorporated community in Eastern Township, Franklin County, Illinois, United States. Akin is east of Benton and north of Thompsonville. Akin had a post office, which closed on July 2, 2011.HistoryThe post office had been in operation at Akin since 1860. George W. Aken, the first postmaster, most likely gave the community his name.