|Men's canoe sprint|
|1970 Copenhagen||K-4 10000 m|
|1973 Tampere||K-4 10000 m|
Horst Mattern (born 4 November 1943) is a West German sprint canoer who competed from the late 1960s to the mid-1970s. He won two silver medals in the K-4 10000 m event at the ICF Canoe Sprint World Championships, earning them in 1970 and 1973.
- ICF medalists for Olympic and World Championships – Part 1: flatwater (now sprint): 1936–2007 at the Wayback Machine (archived 2010-01-05)
- ICF medalists for Olympic and World Championships – Part 2: rest of flatwater (now sprint) and remaining canoeing disciplines: 1936–2007 at WebCite (archived 2009-11-09)
- Sports-reference.com profile