[3] The Township was named in 1798 for Lady Elizabeth Seymour, the wife of Hugh Percy, the first Duke of Northumberland.
Adjoining Seymour Township was given the Baroness' maiden name.
The community of Warkworth is located in Percy and was the administrative centre for the municipality.
In 2001, Percy was amalgamated with Hastings, the Town of Campbellford and the Township of Seymour to form the Town of Campbellford / Seymour, Percy & Hastings.
Prior to amalgamation, communities in the Township of Percy included Brickley, Dartford, Godolphin, Hastings, Norham, South Hastings, Sunnybrae and Warkworth.