Brentwood Bay, British Columbia is a small neighbourhood, often characterized as a "village", in the municipality of Central Saanich, on the Saanich Peninsula just north of the City of Victoria and south of Sidney on the southern tip of Vancouver Island.

The ferry docks at Brentwood Bay
Situated on the Saanich Inlet, it includes the world-famous Butchart Gardens as its main attraction, and lesser known destinations such as the Victoria Butterfly Gardens and the Brentwood Bay Lodge & Spa. The region also plays host to various wineries and restaurants, and also features hiking and a variety of wildlife in Gowlland Tod Provincial Park.
Brentwood Bay is part of the Central Saanich Municipality (pop. 15,348 (2001)), one of 13 that make up the Greater Victoria area (pop. 311,902 (2001)). It is located on Highway 17A just west of Highway 17 (AKA the Pat Bay Highway), the main route running the length of the Saanich Peninsula. It is also served frequently by the Brentwood-Mill Bay ferry, run by BC Ferries.

Filmed in Brentwood Bay

- Black Point starring David Caruso in 2001
- The Mermaid Chair starring Kim Basinger in 2006
- April Fool's Day