Mathias Clemens (Rédange, Moselle, August 8, 1915 — Huncherange, November 26, 2001) was a Luxembourgish professional road bicycle racer. Mathias Clemens was the brother of cyclist Pierre Clemens.
Major results
- 1935
- Tour de Luxembourg
- Overall classification
- 1936
- Grunwald
- Luxembourg
- Tour de France:
- Winner stage 3
- 7th place overall classification
- Tour de Luxembourg:
- Overall classification
- Winner stage 8
- 1937
- Tour de Luxembourg:
- Overall classification
- Winner stage 1
- 1938
- Hollerich
- Luxembourg
- Luxembourg national road race championships
- Tour de Luxembourg:
- Winner stage 3
- Tour de France:
- 5th place overall classification
- 1939
- Tour de Luxembourg:
- Overall classification
- Winner stages 3 and 4
- Tour de France:
- 4th place overall classification
- 1940
- Luxembourg national cyclo-cross championships
- 1941
- GP Schweinfurt (GER)
- Luxembourg
- Rundfahrt Westmark (inc. stage 2)
- 1942
- Esch-sur-Alzette
- Huncherange
- 1943
- Pétange
- Wiltz
- 1944
- Esch-sur-Alzette
- Wiltz
- 1947
- Alger
- Tour de Luxembourg:
- Overall classification
- Winner stage 3
- Luxembourg national road race championships