The Transitional Government of National Unity (TGNU), also commonly called the Interim Government, was the government of Namibia (then officially South West Africa) from June 1985 to February 1989.
Following the 1975–1977 Turnhalle Constitutional Conference, the first multiracial elections were held in the occupied territory in 1978, and a National Assembly as well as a Council of Ministers was constituted. Dirk Mudge became chairman of the ministerial council. Already in 1972 the United Nations had decreed SWAPO to be the "sole legitimate representative" of Namibia's people, but SWAPO was not invited to the Turnhalle conference and boycotted the subsequent elections. The United Nations Security Council consequently declared the election null and void, and the interim government illegitimate.
Following interference by the South African Administrator-General the Council of Ministers resigned, and on 18 January 1983 South Africa accepted the dissolution of both the legislative and the executive body without elections being scheduled, and again assumed full administrative authority over South West Africa.
The subsequent void was filled by South African administrators. Willie van Niekerk was appointed administrator-general for South West Africa and Jan F Greebe became chief executive officer. A Judicial Commission was appointed. Urged by United Nations Security Council Resolution 532 to speed up the process of releasing the territory into independence, a State Council was established in May 1983. In September this Council was obsoleted by the establishment of the Multi-Party Conference (MPC) which consisted of 19 parties but again excluded SWAPO. The MPC issued the Windhoek Declaration of Basic Principles in 1984 and the Bill of Fundamental Rights and Objectives, wherein the establishment of a Transitional Government of National Unity is requested from the South African administration, in 1985.