Álvur Zachariasen (born June 5, 1931) is a former Faroese foreman, teacher, and politician for the Home Rule Party.
Zachariasen was born in Klaksvík, the son of Símun Petur Zachariasen and Maria Henriksen. He is also the nephew of the writer and politician Louis Zachariasen. Zachariasen graduated as a ship's captain in 1957 and was a foreman at the Lauritzen shipping company from 1955 to 1964, after which he held an equivalent position at the Faroe Ship (Faroese: Skipafelagið Føroyar) shipping company until 1971. After this he was a teacher at the Klaksvík Nautical School (Faroese: Klaksvíkar Sjómansskúla) from 1972 to 1998.
Zachariasen was a member of the municipal council for Klaksvík from 1980 to 1997. He also served as a representative of the Norðoyar district for the Home Rule Party in the Faroese Parliament from 1994 to 1998.