Dennis Leyckes (born 20 April 1982 in Krefeld) is a German decathlete.
His personal best score is 8310 points, achieved in June 2006 in Ratingen.
His father Dieter Leyckes won the decathlon silver medal at the 1979 European Junior Championships. He is coached by Torsten Voss.
| Year | Tournament | Venue | Result | Extra |
|---|---|---|---|---|
| 2000 | World Junior Championships | Santiago, Chile | 1st | Decathlon |
| 2002 | Hypo-Meeting | Götzis, Austria | DNF | Decathlon |
| 2004 | Olympic Games | Athens, Greece | DNF | Decathlon |
| 2005 | Hypo-Meeting | Götzis, Austria | DNF | Decathlon |
| 2006 | European Championships | Gothenburg, Sweden | DNF | Decathlon |
| 2007 | European Indoor Championships | Birmingham, England | 4th | Heptathlon |
| Hypo-Meeting | Götzis, Austria | DNF | Decathlon |