Johnny Moss was the youngest by definition when he won the first World Series of Poker by vote, and seven others have taken the crown (ages listed in years.months.days format):
| Age | Player | Year |
|---|---|---|
| 62.11.24 | Johnny Moss | 1970 |
| 43.4.10 | Amarillo Slim Preston | 1972 |
| 42.9.0 | Doyle Brunson | 1976 |
| 28.4.18 | Bobby Baldwin | 1978 |
| 26.8.14 | Stu Ungar | 1980 |
| 24.10.3 | Phil Hellmuth | 1989 |
| 22.10.28 | Peter Eastgate | 2008 |
| 21.11.23 | Joe Cada | 2009 |
Hellmuth was the youngest champ for almost two decades, but five out of the six champs from 2008 to 2013 were younger than he was: Eastgate and Cada, Jonathan Duhamel (23 in 2010), Pius Heinz (22 in 2011), and Ryan Riess (23 in 2013). Additionally, Greg Merson was just 19 days older in 2012.
The ten youngest champs:
| Age | Player | Year |
|---|---|---|
| 21.11.23 | Joe Cada | 2009 |
| 22.10.28 | Peter Eastgate | 2008 |
| 22.5.28 | Pius Heinz | 2011 |
| 23.2.16 | Jonathan Duhamel | 2010 |
| 23.6.17 | Ryan Riess | 2013 |
| 24.10.22 | Greg Merson | 2012 |
| 24.10.3 | Phil Hellmuth | 1989 |
| 24.4.13 | Joe McKeehen | 2015 |
| 25.3.26 | Scott Blumstein | 2017 |
| 26.8.14 | Stu Ungar | 1980 |
Eight of the ten have won since 2008.