| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Valdemar Christoffer•Nielsen |
| Used name | Valdemar C.•Nielsen |
| Born | 21 September 1893 in København (Copenhagen), Hovedstaden (DEN) |
| Died | 16 May 1972 (aged 78 years 7 months 25 days) in Risbjerg, Hvidovre, Hovedstaden (DEN) |
| Affiliations | ABC, København (DEN) |
| NOC |  Denmark |
Valdemar C. Nielsen was just 19 years old when he competed at the Olympic Games in Stockholm in 1912; however, he did not finish the road time trial. In 1923, he finished 13th at the first-ever world championships in road race, a 164 km race in Switzerland from Zürich to Basel and back.
Nielsen married Gudrun Rigmor Bigom in 1919. They had one daughter.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1912 Summer Olympics | Cycling Road (Cycling) | DEN |
Valdemar C. Nielsen | |||
| Road Race, Individual, Men (Olympic) | ||||||
| Road Race, Team, Men (Olympic) | Denmark | 8 |
