| Fredrik Christian Steffens Sejersted | |
| Birth Date: | 5 May 1901 |
| Birth Place: | Kristiania, Norway |
| Nationality: | Norwegian |
| Occupation: | Judge |
| Parents: | Nils Johannes Sejersted |
| Awards: | Order of St. Olav Defence Medal 1940–1945 |
Fredrik Christian Steffens Sejersted (5 May 1901 – 1987[1]) was a Norwegian jurist.
In 1923. From 1929 to 1969 he was appointed jurist for Norsk Hydro. He served as acting Supreme Court Justice from 1946 to 1947. He was decorated Knight, First Class of the Order of St. Olav in 1971.[2]