Tioga is an unincorporated community in Mahaska County, in the U.S. state of Iowa.
Tioga was platted in 1886. It was named after Tioga, Tioga County, Pennsylvania. A post office opened in Tioga in 1886 and closed in 1920.
Tioga's population was 30 in 1902, and 45 in 1925. The population was 12 in 1940.