Sir Peter Charles Leitch, KNZM, QSM, (born 1944) is a New Zealand businessman, also known as The Mad Butcher. Although well known in New Zealand for the chain of butcheries he founded, Leitch is arguably just as well known for his charity, fundraising work and his promotion of rugby league.

In 2010, Leitch was made a Knights Companion of the New Zealand Order of Merit in the Queen's Birthday Honours List for services to business and philanthropy. He was awarded a Queen's Service Medal in 1991 for charitable work.