Delisle, OhioDelisle is an unincorporated community in Darke County, in the U.S. state of Ohio.HistoryDelisle was platted by Catherine Fairchild in 1850 when the railroad was extended to that point. Delisle also had a schoolhouse until 1951, at which time students began attending schools in nearby Arcanum. A post office was established at Delisle in 1856, and remained in operation until 1993.