John Herron, served as Mayor of Pittsburgh from 1849 to 1850. He was a Whig. He was the son of Dr. Francis Herron, the well-known Presbyterian Minister. The Herrons were among the founding families of Pittsburgh. He captained the Duquesne Grays in the Mexican-American War during the Siege of Veracruz. His war feats greatly enhanced his electability and President Zachary Taylor visited the city during Mayor Herron's term.