Murtagh (Irish: Muircheartach) is an Irish surname, and may refer to:
- St. Murtagh
- Chris Murtagh, a cricketer
- Conall Murtagh, a footballer
- John Murtagh, New Zealand cricketer
- Johnny Murtagh, Irish jockey
- Keiran Murtagh, Antigua and Barbuda international footballer
- Lisa Murtagh, Rose of Tralee winner
- Tim Murtagh, English cricketer
- Valerie Murtagh and Elaine Murtagh of the singing group The Avons
- Murtagh, a character in the Inheritance Cycle