Sir Peter Charles Leitch KNZM QSM (born 8 May 1944), also known as The Mad Butcher, is a New Zealand businessman.

He gained a job as a butcher's apprentice in a Seatoun butchery at the age of 16, before later moving to Auckland.

[1] The Mad Butcher Suburban Newspapers Community Trust is a fundraising vehicle he helped create to benefit charities.

[6][7] In the 2010 Queen's Birthday Honours, Leitch was appointed a Knight Companion of the New Zealand Order of Merit for services to business and philanthropy.

In 2011 he was made patron of the New Zealand Rugby League, replacing Helen Clark.

[12] Leitch agreed that during the exchange he told her that Waiheke "is a white man's island also", but says his comments were misinterpreted and that it was merely banter.