| Johan Fritzner | |
| Birth Date: | 9 April 1812 |
| Birth Place: | Askøy, Hordaland |
| Death Place: | Christiania |
Johan Fritzner (9 April 1812 - 10 December 1893) was a Norwegian priest and lexicographer. He is known for his magnum opus Ordbog over det gamle norske Sprog, a major dictionary of Old Norse vocabulary.