Annacis Island

Annacis Island is an island located in the south arm of the Fraser River, in the Lower Mainland municipality of Queensborough. The island is now mostly industrial, and it contains one of the region's secondary wastewater treatment plants.

The southern part of the island is connected to Delta and Surrey via the Alex Fraser Bridge, which is part of Highway 91. Connections northward to Richmond and New Westminster are via smaller bridges on Highway 91. At the eastern end of the island there is also the Derwent Way Bridge which connects the island to the residential area of Queensborough, which is located on the eastern tip of Lulu Island where the Fraser River splits into its North and South Arms; most of Lulu Island is occupied by the city of Richmond, which is separated from Queensborough by farmland. The island is served by a public bus that connects to 22nd Street Station in New Westminster.

The wider part of the Fraser River south of the island is known as Annieville Channel (upstream) and City Reach (downstream), while the more narrow channel north of the island is called Annacis Channel. The eastern (upstream) tip of the island is known as Shoal Point, and the western (downstream) tip is known as Purfleet Point. The island's name is derived from a corruption of "Annance's Island," named for Noel François Annance, a sailor of the Abenaki First Nation and a Hudson's Bay Company clerk, who travelled with Chief Factor James McMillan to found Fort Langley in 1827.