The Sifton Bog Environmentally Significant Area is a wetland jointly administered by the city of London, Ontario and the Upper Thames River Conservation Authority.

It is located west of Hyde Park Road and south of Oxford Street inside the city limits of London, Southern Ontario, Canada.

[5] The central bog vegetation is dominated by Sphagnum and Chamaedaphne calyculata (leatherleaf), with a few short larches (Larix laricina) and black spruce (Picea mariana).

[6] The depression that houses the bog was created like many local geologic features, by the effects of glaciation.

The Alder Buckthorn, a plant native to the bog, was harvested and used during the Second World War to produce gunpowder.