Peter Fisher may refer to:

• Peter Fisher (photojournalist) (1929–2013), Hungarian-born cinematographer and photojournalist
• Peter Fisher (actor) (born 1954), Australian film and television actor
• Peter Fisher (politician) (born 1936), member of the Australian House of Representatives
• Peter Fisher (footballer) (fl. 1930s), Scottish professional association footballer
• Peter Fisher (activist) (1944–2012), American author and gay rights activist
• Peter Fisher (historian) (1782–1848), Canadian historian
• Peter Fisher (musician) (fl. 1990–now), of the British band Sphere³ and Irish band Glyde
• Peter Fisher (physician) (born 1950), British physician
• Peter Fisher (translator) (born 1934), British, professor emeritus from Anglia Polytechnic University, Cambridge, known for translating Gesta Danorum
• Peter R. Fisher (born 1956), U.S. Under Secretary of the Treasury
• Peter H. Fisher, physicist