Alfred Napoleon Piesse (17 July 1866 – 15 June 1939) was an Australian politician who served as a member of the Legislative Assembly of Western Australia from 1911 to 1924, representing the seat of Toodyay.
He joined the Country Party upon its formation in 1914, and served as state deputy leader from 1915 to 1921, initially under Francis Willmott and then under Tom Harrison.