Peter John Gresham ONZM JP (7 July 1933 – 31 August 2024) was a New Zealand politician.
Gresham was born in Geraldine in 1933, and was educated at St Kevin's College in Oamaru.
At the 1996 election, the bulk of his Waitotara seat was merged with Wanganui to create the new seat of Whanganui, and Gresham was defeated by Jill Pettis of the Labour Party.
Gresham remained in Parliament as a list MP, but retired at the 1999 election.
[6] In the 2002 Queen's Birthday and Golden Jubilee Honours, Gresham was appointed an Officer of the New Zealand Order of Merit, for public services.