| Niels Olsen | |
| Full Name: | Niels Alfred Olsen |
| Nationality: | Danish |
| Sport: | Rowing |
| Birth Date: | 28 December 1948 |
| Birth Place: | Faxe, Denmark |
Niels Olsen (born 28 December 1948) is a Danish rower. He competed in the men's coxed pair event at the 1964 Summer Olympics.[1]