John Brackett "Pie" Allen (October 22, 1818 – June 13, 1899) was an American prospector, businessman, and politician. Unsuccessful in his efforts as a prospector, he earned his nickname baking pies for settlers and soldiers in Arizona Territory. His business success made him a prominent territorial citizen and he served three terms in the Arizona Territorial Legislature, two terms as Mayor of Tucson, Arizona Territory, and was appointed Arizona Territorial Treasurer for six years.