Johannes Andreas Truter, also known as Sir John Truter (11 October 1763 - 5 June 1845), was the judicial officer of the Cape Colony and president of the Court of Justice at the Cape of Good Hope. He was also a South African Freemason and member of the Grand Orient of the Netherlands in South Africa. He was the uncle of Marie Koopmans-de Wet.
Truter also served on the first board of directors of the South African College, which would later become the University of Cape Town and SACS.