Petras is a surname. Notable people with the surname include:
- Andjei Petras (born 1972), Russian composer
- Ernestine Petras (1924–2017), American baseball player
- Herb Petras, Canadian military commander
- James Petras (born 1937), American sociologist
- Kim Petras (born 1992), German singer
- Spencer Petras (born 1999), American football player
See also
- Petras (given name)
- Petráš, Slovak family name
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