| Petur Alberg | |
| Birth Date: | 15 December 1885 |
| Birth Place: | Tórshavn, Faroe Islands |
| Death Place: | Faroe Islands |
| Nationality: | Faroese |
| Known For: | composing the Faroese national anthem |
Petur Alberg (15 December 1885 - 1940) was a Faroese violin player and songwriter from Tórshavn. He composed the anthem of the Faroes, "Mítt alfagra land", or "Tú alfagra land mítt", as it is usually called.