| Octagon | |
| Type: | studio |
| Artist: | Bathory |
| Cover: | Octagon album.jpg |
| Released: | 17 October 1995 |
| Recorded: | 30 January – 23 March 1995 |
| Studio: | Hellhole Studios (Stockholm, Sweden) |
| Genre: | Thrash metal |
| Length: | 39:40 |
| Label: | Black Mark |
| Producer: | Borje Forsberg, Quorthon |
| Prev Title: | Requiem |
| Prev Year: | 1994 |
| Next Title: | Blood on Ice |
| Next Year: | 1996 |
Octagon is the eighth studio album by Swedish extreme metal band Bathory. It was released on 17 October 1995 through Black Mark Production. It continues the retro thrash metal style of the previous album, Requiem. It was reissued in 2003, with the first two tracks combined and "Winds of Mayhem" outro added.