The Barra Strait[1] is a 1.22 km (0.76 mi) wide channel located in the Canadian province of Nova Scotia.

It connects the northern and southern basins of Bras d'Or Lake, an inland saltwater body that dominates the centre of Cape Breton Island.

The Government of Nova Scotia operated a small ferry service for motor vehicles across the strait for much of the 20th century.

The strait continues 2.2 km (1.4 mi) to the north-east where it narrows to slightly more than 500 metres (1,600 ft) between Uniacke and Kelly Points.

The tidal streams set 010°/190° through the strait, except in the vicinity of the swing bridge span where they are deflected NW and SW by Kelly Point.