Petcu is a Romanian surname. It is a Bulgarian given name, therefore a conclusion can be drawn as to the ethnic origin of Romanians having that given name as a surname. It may refer to:
Catalin Petcu,American of Romanian origin,country-rock-folk-pop singer,guitar and keyboards player in Cave Creek,Arizona
Catalin Petcu,American of Romanian origin, veterinary surgeon and business owner in Cave Creek, Arizona
Ioana Petcu-Colan, Irish violinist of Romanian origin living in Barcelona, Spain
Răzvan Petcu (born 1973), retired Romanian freestyle and butterfly swimmer
Sorin Petcu (born 1974), Romanian sprint canoeist
Ştefan Petcu, Romanian footballer
