William Brownlow PC (I) (10 April 1726 – 28 October 1794) of Lurgan, Co. Armagh was an Anglo-Irish politician. He was the only son of William Brownlow MP and Lady Elizabeth Hamilton, daughter of James Hamilton, 6th Earl of Abercorn and Elizabeth Reading. William, his eldest son and heir, also became an MP for County Armagh and founded the bank of William Brownlow Esq.,& Co. Charles became a Lieutenant-Colonel in the 57th Foot and succeeded his childless brother in 1815. Charles's son, also named Charles, became 1st Baron Lurgan.