Nicklas Robert Wiberg (born 16 April 1985 in Stockholm) is a male decathlete from Sweden. He set his personal best score (8406 points) in the men's decathlon on 20 August 2009 in Berlin.
| Year | Competition | Venue | Position | Event | Notes |
|---|---|---|---|---|---|
Representing  Sweden
| |||||
| 2003 | European Junior Championships | Tampere, Finland | 1st | Decathlon | 7604 pts |
| 2004 | World Junior Championships | Grosseto, Italy | — | Decathlon (junior) | DNF |
| 2006 | European Championships | Gothenburg, Sweden | 20th | Decathlon | 6929 pts |
| 2007 | Hypo-Meeting | Götzis, Austria | 12th | Decathlon | 7870 pts |
| European U23 Championships | Debrecen, Hungary | 17th (q) | Javelin | 66.90 m | |
| 2008 | Hypo-Meeting | Götzis, Austria | 11th | Decathlon | 7917 pts |
| 2009 | Hypo-Meeting | Götzis, Austria | 7th | Decathlon | 8213 pts |
| World Championships | Berlin, Germany | 7th | Decathlon | 8406 pts | |
