Valdemar Nielsen
| Personal information | |
|---|---|
| Born | 21 June 1879 Copenhagen, Denmark |
| Died | 3 June 1954 (aged 74) |
Valdemar Nielsen (21 June 1879 – 3 June 1954) was a Danish cyclist. He competed in two events at the 1912 Summer Olympics. In 1911 he won the Danish 345 km long-distance classic Sjælland Rundt.