Fort Amherst, Military fort and lighthouse in St. John's, Canada.

Fort Amherst is a neighbourhood on the south side of the Narrows, the entrance to St. John's harbour. Besides some family dwellings, it holds a man-made harbour, a lighthouse and the remains of World War II gun emplacements, where two QF 4.7-inch B Mark IV* guns still sit on their mountings. The fortifications of the 1770s are no longer visible.

The first fortifications at Fort Amherst were built in the 1770s to control the entrance to St. John's harbour; they are no longer visible. They were named for William Amherst, who retook St. John's from French forces in 1762. The fort long operated alongside Fort Waldegrave, and the site was designated a National Historic Site of Canada in 1951.

The name honours William Amherst, who retook St. John's from French forces in 1762. The site worked alongside Fort Waldegrave for much of its history, and the name is shared with Port La-Joye / Fort Amherst in Prince Edward Island and Fort Amherst in England.

A visit is best during fair weather, as the clifftop can be windy and slippery, and fog often blocks views across the bay. Sturdy shoes are recommended, and visitors should stay on designated paths since the cliff edges are hazardous.

The two guns left on their mountings are QF 4.7-inch B Mark IV* pieces, installed in World War II against German U-boats. The 1770s fortifications themselves have left no visible trace, so the surviving artillery is what remains to be seen on the site today.