The internationally unrecognised Rhodesia abolished their monarchy and declared themselves a republic.

Rhodesia, officially the Republic of Rhodesia from 1970, was an unrecognised state in Southern Africa that existed from 1965 to 1979. Rhodesia served as the de facto successor state to the British colony of Southern Rhodesia following a unilateral declaration of independence issued by the ruling white-minority government. Throughout this fourteen-year period, Rhodesia faced internal conflict and political unrest. Following the Lancaster House Agreement in 1979, the territory returned to British political control and then subsequently gained internationally recognised independence as Zimbabwe in 1980.

Queen of Rhodesia was the title asserted for Elizabeth II as Rhodesia's constitutional monarch following the country's Unilateral Declaration of Independence from the United Kingdom. However, the position only existed under the Rhodesian constitution of 1965 and remained unrecognised elsewhere in the world. The British government, along with the United Nations and almost all governments, regarded the declaration of independence as an illegal act. The White-led Rhodesian government declared the country a republic in 1970, abolishing the position of monarch.