Peter Simako Otlaadisang Mmusi (born 16 May 1929, died October 1994) was the Vice-President of Botswana from 3 January 1983 until 1992.
He also served as the Minister of Local Government and Lands.
He was born in Mmankgodi in the Kweneng District.
He resigned following a Presidential Commission which identified him as taking part in illegal land dealings outside Gaborone.