| Sidney de Jong | |
| Position: | Catcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 14 April 1979 |
| Birth Place: | Amsterdam, Netherlands |
Sidney de Jong (born 14 April 1979) is a Dutch former baseball player.
De Jong represented the Netherlands at the 2004 Summer Olympics in Athens where he and his team finished sixth. He also represented the Dutch at the 2009 World Baseball Classic in San Juan, Puerto Rico and in Miami, Florida.Following the 2011 Baseball World Cup he was knighted, along with teammate Didi Gregorius and technical director Robert Eenhoorn.