- Source of Wealth: Music
- Age: 55
- Birth Place: Seattle, Washington, United States
- Height: 6′ 3″ (1.91 m)
- Marital Status: Married (Susan Holmes)
- Full Name: Michael Andrew McKagan
- Nationality: American
- Date of Birth: February 5, 1964
- Ethnicity: Dutch, English, French, German, Irish, Scots-Irish, Cornish, Swish, French, Welsh
- Occupation: Musician, Writer
- Education: Seattle University Albers School of Business and Economics
- Children: 2 (Grace, Mae Marie)
Rock musician Duff McKagan has an estimated net worth of $20 million. He grew up in Seattle where he was taught to play bass guitar by his brother Bruce, and after dropping out of high school, he played in several Seattle bands before moving to Los Angeles where he earned a living waiting tables. He met future Guns N’ Roses band mates Slash and Steven Adler after answering a newspaper advert and all three of them joined singer Axl Rose in Guns N’ Roses a short while later. After a roller coaster ride through highs and lows fueled by drink and drugs, he finally left the band in 1997.