| Ordo Regnum Sathanas | |
| Type: | compilation |
| Artist: | Horna |
| Cover: | Ordo Regnum Sathanas.jpg |
| Released: | 2004 |
| Genre: | Black metal |
| Length: | 59:31 |
| Label: | Adversary Productions |
| Prev Title: | Horna/Ouroboros |
| Prev Year: | 2003 |
| Next Title: | Talismaani |
| Next Year: | 2004 |
Ordo Regnum Sathanas is the second compilation by the black metal band Horna. It was released on Adversary Productions in 2004 and was limited to 300 copies.