John Udall
John Udall may refer to:
- John Udall (Puritan) (1560?–1592), English clergyman
 - John Hunt Udall (1889–1959), mayor of Phoenix, Arizona, 1936–1938
 - John Nicholas Udall (1913–2005), mayor of Phoenix, Arizona, 1948–1952, and son of John Hunt Udall