Gwynneville is an unincorporated community in Hanover Township, Shelby County, in the U.S. state of Indiana.Gwynneville was platted in 1881, and named after O'Brien Gynne, a local businessman and landowner. A post office opened at Gwynneville in 1881. Gwynneville had its own high school until the school was discontinued around 1918.Gwynneville is located at 3939?39?N 8538?53?W? / ?39.66083N 85.64806W? / 39.66083; -85.64806.