| Diederik van Weel | |
| Full Name: | Diederik David van Weel |
| Birth Date: | 28 September 1973 |
| Birth Place: | Baarn, Netherlands |
| Position: | Defender |
| Clubs1: | Laren |
| Years2: | –2002 |
| Clubs2: | Bloemendaal |
| Years3: | 2002–2005 |
| Clubs3: | Laren |
| Nationalyears1: | 1998–2002 |
| Nationalteam1: | Netherlands |
| Nationalcaps1: | 61 |
| Nationalgoals1: | 0 |
Diederik David van Weel (born 28 September 1973, in Baarn) is a former Dutch field hockey player, who played 61 international matches for the Netherlands, in which he didn't score a single goal. The defender made his debut for the Dutch on 17 August 1998 in a match against Argentina. He played in the Dutch League for HC Bloemendaal and Laren, and was a member of the team that won the gold medal at the 2000 Summer Olympics in Sydney. He stopped playing hockey in 2005.