| Nils Christiansen | |
| Fullname: | Nils Adolph Isabello Christiansen y Fraga |
| Birth Date: | 8 July 1913 |
| Birth Place: | Batangas, Philippine Commonwealth |
| Death Place: | Golden, Colorado, United States |
Nils Christiansen (8 July 1913 - 15 July 1988) was a Filipino-American swimmer.[1] He competed in two events at the 1936 Summer Olympics.[2]