Dull, OhioDull is an unincorporated community in Liberty Township, Van Wert County, Ohio, United States. Dull is west-southwest of Ohio City.HistoryDull was originally called McKee, and under the latter name was laid out in 1879 by J. M. Dull and others. A post office was established under the name Dull in 1880, and remained in operation until 1909. The community is sometimes called Dulltown.