Several people are named Peter Marshall:

1. Peter Marshall (game show host) is an American singer and game show host, best known as the original "master" of The Hollywood Squares from 1966–1981. He also appeared in the 1982 movie Annie.
2. Peter Marshall (british host) is a British television game show host, having hosted a version of Sale of the Century in the 1980s.
3. Peter Marshall (squash player) was the runner up of the 1994 World Open Squash Championships , losing to Jansher Khan of Pakistan.
4. Peter Marshall (QPM) , QPM was the Commissioner of the City of London Police from 1977-1985.
5. Peter Marshall (preacher) was a Scottish-born Presbyterian pastor who served various congregations in the United States and as chaplain to the U.S. Senate during World War Two.