Peter Muller, Peter Müller or Peter Mueller may refer to:
- Peter Müller (ice hockey) (1896–1974), Swiss ice hockey player
- Peter Muller (architect) (1927–2023), architect with works in Bali, Sydney, South Australia and Melbourne
- Peter Müller (boxer) (1928–2013), Swiss boxer
- Peter Müller (footballer, born 1946), East German footballer
- Peter Müller (footballer, born 1948), West German footballer
- Peter Muller (Canadian football) (born 1951), former tight end for the Toronto Argonauts
- Peter Mueller (speed skater) (born 1954), former US speed skater and speed skating coach
- Peter Müller (mayor), mayor of Windhoek, South West Africa
- Peter Müller (politician) (born 1955), German politician and judge
- Peter Müller (skier) (born 1957), Swiss alpine skier competing in the 1980s
- Peter Müller (co-driver) (born 1962), Austrian rally co-driver
- Peter Müller (footballer, born 1969), German footballer
- Pete Muller (photographer) (born 1982), news photographer
- Peter Mueller (ice hockey) (born 1988), American ice hockey player, playing in the NLA
- Peter Muller (actor), played Dr. Logan King in the television series Shortland Street
- Pete Muller (businessman and singer-songwriter), musician and founder and CEO of PDT Partners