Radio Otago was a radio company that operated a group of local radio stations in radio markets around New Zealand from the 1970s to the late 1990s. Radio Otago was started in 1971 when Dunedin station 4XO was started, 4XO was originally branded as Radio Otago 4XO.During the 1980s and 1990s Radio Otago expanded their operations by starting up stations around Otago and the rest of New Zealand, and also by purchasing existing stations.