| Simen Oscar Fredrik Omang | |
| Birth Date: | 23 March 1867 |
| Birth Place: | Hamar, Norway |
| Nationality: | Norwegian |
| Occupation: | botanist |
| Children: | Reidar Omang |
Simen Oscar Fredrik Omang (23 March 1867 - 29 November 1953) was a Norwegian botanist.
Omang was born in Hamar on 23 March 1867, and graduated as cand.real. in 1895. He specialized in the genus Hieracium, and described several new species of the genus.[1]
He was the father of Reidar Omang.[2]