Petry, or Pétry, is a surname. Notable people with the surname include:
Ann Petry (1908–1997), American author
Cássio Petry (born 1978), Brazilian canoeist
Dan Petry (born 1958), American baseball player
Frauke Petry (born 1975), German chemist, businesswoman and politician (AfD)
Jeff Petry (born 1987), American ice hockey player
Juliusz Petry (1890–1961), Polish writer
Lasse Petry (born 1992), Danish footballer
Leroy Petry (born 1979), American soldier and Medal of Honor recipient
Lucile Petry Leone (1902–1999), American nurse
Michael Petry (born 1960), American artist
Michael Petry (footballer) (born 1976), German footballer
Valentin Petry (1928–2016), German racing cyclist
Wolfgang Petry (born 1951), German musician
Zsolt Petry (born 1966), Hungarian footballer