| Birth Date: | 1946 10, df=yes |
| Birth Place: | Odder, Denmark |
| Height: | 1.76m (05.77feet) |
| Weight: | 75kg (165lb) |
| Sport: | Cycling |
| Club: | Aarhus Bane – Klub, Århus |
| Show-Medals: | yes |
Niels Christian Fredborg (born 28 October 1946) is a retired Danish track cyclist. He competed at the 1964, 1968, 1972 and 1976 Summer Olympics in the sprint and 1 km time trial events, winning a silver, a gold and a bronze medal in the time trial in 1968, 1972 and 1976, respectively. In 1972 he was Denmark's only Olympic medalist.
At the Track Cycling World Championships, Fredborg won the 1 km time trial in 1967, 1968 and 1970.