| Official Name: | Reñaca |
| Subdivision Type: | Region |
| Subdivision Name: | Valparaíso |
| Subdivision Type1: | Province |
| Subdivision Name1: | Valparaíso |
| Subdivision Type2: | Municipalidad |
| Subdivision Name2: | Viña del Mar |
| Subdivision Type3: | Comuna |
| Subdivision Name3: | Viña del Mar |
| Government Type: | Municipality |
| Leader Party: | RD |
| Leader Title: | Alcalde |
| Leader Name: | Macarena Ripamonti |
| Population As Of: | 2002 |
| Population Total: | 14,954[1] |
| Demographics Type1: | Sex |
| Demographics1 Title1: | Men |
| Demographics1 Info1: | 7,218 |
| Demographics1 Title2: | Women |
| Demographics1 Info2: | 7,736 |
| Timezone: | Chilean Standard |
| Utc Offset: | -4 |
| Timezone Dst: | Chilean Daylight |
| Utc Offset Dst: | -3 |
| Area Code: | Country + town = 56 + 32 |
Reñaca or Reñaca Bajo, is a seaside neighborhood in the commune of Viña del Mar, Chile.[1] The city is located along the coast in between the city of Viña del Mar and the town of Concón. Since the commune of Concón was created in 1995 Reñaca and Concón have effectively merged into one large urbanization, this led in 2021 to a public debate on whether it should be split from Viña del Mar to join it with Concón.[2] As part of the urban growth of Reñaca toward Concón in the north, various coastal wetlands and dunes have been urbanized since 1994.[3]