| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Birger Marinus•Andreassen |
| Used name | Birger•Andreassen |
| Born | 31 December 1891 in Oslo, Oslo (NOR) |
| Died | 25 March 1961 (aged 69 years 2 months 25 days) in Oslo, Oslo (NOR) |
| Affiliations | Cykleklubben Vidar, Kristiania |
| NOC |  Norway |
Birger Andreassen was born and lived in Kristiania (now Oslo). He first worked as an assistant for a petroleum company and later for Norges Bank. He was married to seamstress Alfhild Helene Schou Nilsen.
At the 1912 Olympic Games in Stockholm, he placed 14th in the individual road time trial, the best result of the Norwegian riders. Norway was not counted for the team event, as only three of the required four members finished the race.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1912 Summer Olympics | Cycling Road (Cycling) | NOR |
Birger Andreassen | |||
| Road Race, Men (Olympic) | 14 | |||||
| Road Race, Team, Men (Olympic) | Norway |
