- Source of Wealth: Football
- Age: 40
- Birth Place: Ballyboden, Ireland
- Height: 1.77 m (5′ 10″)
- Weight: 59 kg (117 lbs)
- Marital Status: Married (Elaine Duff)
- Full Name: Damien Anthony Duff
- Nationality: Irish
- Date of Birth: March 2, 1979
- Occupation: Professional Football Coach, Former Football Player
- Children: 2 (Woody, Darcy)
Damien Anthony Duff is an Irish professional football coach and former professional football player. Currently the first-team coach at Shamrock Rovers, he has a net worth of $30 million. He predominantly played as a winger for Premier League team Fulham and the Republic of Ireland national football team. Duff has won a total of 95 international caps. He began his career with Blackburn Rovers where he won the Football League Cup then he signed with Chelsea where he won two Premier League titles and another League Cup. He then moved to Newcastle where he won the 2006 UEFA Intertoto Cup. He finally played for Fulham in the Premier League where he played in the 2010 UEFA Europa League Final. He had brief stints with the A-League with Melbourne City and the League of Ireland with Shamrock Rovers before his retirement in December 2015.