Petrer (Valencian pronunciation: [peˈtɾeɾ], Spanish: Petrel [peˈtɾel]) is a town located in the comarca of Vinalopó Mitjà, in the province of Alicante, Spain.
Petrer joins together with the city of Elda to form a conurbation with over 95,000 inhabitants. The river Rambla de los Molinos (Riverbed of the Mills), a tributary of the river Vinalopó, runs through the urban area of Petrer.
The economy of Petrer is based on the industries of footwear, furs, plastics, construction materials and pottery. The most important monuments in Petrer are the Catholic church of Sant Bartolomeu (Saint Bartholomew), the Arab castle and the hermitages of Sant Bonifaci and Christ.
The Moros i Cristians festival of Petrer attracts many tourists each year.