The Turnhalle Constitutional Conference was a conference held in Windhoek between 1975 and 1977, tasked with the development of a constitution for a self-governed South West Africa (Namibia) under South African control. Sponsored by the South African government, the Turnhalle Conference laid the framework for the government of South West Africa from 1977 to independence in 1989.
The conference was held in defiance of the 1972 United Nations General Assembly decision to recognise the South West Africa People's Organization (SWAPO) as "sole legitimate representative" of Namibia's people. Consequently, SWAPO, as well as other political groups rejecting apartheid, did not participate, and the UN rejected the conference and its proposals.
As a result of the Turnhalle Conference the Democratic Turnhalle Alliance party was formed in 1977, which won the 1978 election and formed an interim government.