John J. McNally (c. 1854, Charlestown, Massachusetts – March 25, 1931, Brooklyn, New York) was an American playwright, journalist, and drama critic.[1] As a playwright he is best known for penning the books for many Broadway musicals staged between the years 1895–1909. Many of these were crafted for the Rogers Brothers, or were created in collaboration with the songwriting team of Jean Schwartz and William Jerome. He was a longtime drama critic and editor for various Boston newspapers.