#21
15 players have worn #21 for the New York Islanders
Who's Worn #21
| Player | Pos | Seasons |
|---|---|---|
| Kyle Palmieri | C | 2020–2027 |
| Luca Sbisa | D | 2018–2019 |
| Chris Wagner | R | 2017–2018 |
| Kyle Okposo | R | 2007–2016 |
| Deron Quint | D | 2006–2007 |
| Robert Reichel | C | 1996–1999 |
| Dan Plante | R | 1993–1994 1995–1998 |
| Andreas Johansson | L | 1995–1997 |
| Nick Vachon | C | 1996–1997 |
| Bob Halkidis | D | 1995–1996 |
| Ray Ferraro | C | 1990–1995 |
| Mike Kaszycki | C | 1977–1980 |
| Andre St. Laurent | C | 1973–1978 |
| Brian Spencer | L | 1972–1974 |
| Dave Pulkkinen | L | 1972–1973 |