The 1975 South African presidential election resulted in the unanimous election of Nicolaas Johannes Diederichs of the National Party by Parliament to the position of State President on February 21, 1975.Official Gazette (Staatskoerant) of the Republic of South Africa (van die Republiek van Suid-Afrika), Cape Town, February 21, 1975, Vol. 116, No. 4596, . Diedrichs was sworn in on April 19, 1975 during an official ceremony at the Groote Kerk (large church) of Cape Town.
Nicolaas Johannes Diederichs would die 3 years later after a short illness, of a heart attack on 21 August 1978 in Cape Town.
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