General Sir Frederick Augustus Wetherall GCH (1754 – 18 December 1842) was a British Army officer, of Castle Bear House, Ealing.

He entered the Army in 1775 as an ensign in the 17th Regiment of Foot and fought in North America at the Siege of Boston and the subsequent evacuation to Halifax in 1776.

In 1790 he was back in the Americas as an aide to the Duke of Kent in Quebec and the West Indies, where he took part in the capture of Martinique.

[1] Back in North America he raised a regiment in Nova Scotia of which he was made Colonel in 1803.

Safely in Calcutta as the second-in-command he took part in the conquest of Java in 1811, during which campaign he was assisted by his son George Wetherall.