Petrescu is a patronymic surname common in Romania, meaning "son of Petre". Notable people with this surname include:

• Anca Petrescu, architect and politician
• Barbu Petrescu, mayor of Bucharest (1989–1990)
• Camil Petrescu, writer
• Cezar Petrescu, writer
• Constantin Titel Petrescu, social-democratic politician
• Costin Petrescu, painter
• Costin Petrescu, rock music drummer
• Cristian Petrescu, politician
• Dan Petrescu (disambiguation)
• Daniela Petrescu, long-distance runner
• Dimitrie Petrescu-Stelaru, writer
• Dumitru Petrescu, communist politician
• Emil Petrescu, mayor of Bucharest (1914–1916; 1918)
• Ghenadie Petrescu, deposed Romanian Metropolitan Patriarch
• Gică Petrescu, singer
• Marian Petrescu (born 1970), Romanian jazz pianist
• Nicolae Petrescu (1886–1954), philosopher and sociologist
• Nicolae Petrescu-Comnen, diplomat and politician
• Nicolae Petrescu Găină, painter
• Teodosie Petrescu, Archbishop of Tomi

It is also the maiden name of:

• Elena Ceaușescu, communist politician and wife of Nicolae Ceaușescu
• Rodica Mateescu, triple jumper

• All pages with titles containing Petrescu