| Official Name: | Petrer |
| Native Name: | |
| Settlement Type: | Town and municipality |
| Pushpin Map: | Spain |
| Pushpin Map Caption: | Location in Spain |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Autonomous Community |
| Subdivision Name1: | Valencian Community |
| Subdivision Type2: | Province |
| Subdivision Name2: | Alicante |
| Subdivision Type3: | Comarca |
| Subdivision Name3: | Vinalopó Mitjà |
| Subdivision Type4: | Judicial district |
| Subdivision Name4: | Elda |
| Leader Title: | Mayoress |
| Leader Name: | Irene Navarro Díaz |
| Area Total Km2: | 104.26 |
| Population Metro: | 174521 |
| Population Urban: | 218843 |
| Population Blank1 Title: | Demonym |
| Population Demonym: | Catalan; Valencian: petrerí, -ina (Val.) Spanish; Castilian: petrerenses (Sp.) |
| Blank Name Sec1: | Official language(s) |
| Elevation M: | 465 |
| Postal Code Type: | Postcode |
| Postal Code: | 03610 |
Petrer (pronounced as /ca-valencia/; es|'''Petrel''' pronounced as /es/) is a town and municipality located in the comarca of Vinalopó Mitjà, in the province of Alicante of the autonomous community of Valencia, Spain.
Petrer joins together with the city of Elda to form a conurbation with over 95,000 inhabitants. The creek Rambla dels Molins (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.