Yiannis Grivas

Yiannis Grivas (also spelled Ioannis Grivas; Greek: Ιωάννης Γρίβας) (born 1923), Greek judge, was a non-party interim Prime Minister of Greece. Grivas was born in Kato Tithorea in the region of Lokris. He studied law at the University of Athens and in 1954 he became a judge. In 1979, he was appointed to the "Areios Pagos" (Supreme Court of Greece for Civil and Criminal Cases). He became vice-president of the court in 1986 and president in 1989.

In 1989, when the Greek Parliament was deadlocked between the PASOK and New Democracy parties, the Constitution requiring that the President of one of Greece's Supreme Courts be appointed interim Prime Minister, Grivas agreed to head a caretaker government to preside over fresh elections. He took office on 11 October 1989. After the elections produced another deadlocked Parliament, he resigned on 23 November 1989, in favour of Xenophon Zolotas, who formed a coalition government, in which all three Parliament parties participated. Grivas retired in 1990.