| Portal of Sorrow | |
| Type: | studio |
| Artist: | Xasthur |
| Cover: | Xasthur - Portal of Sorrow cover.jpg |
| Released: | March 26, 2010 |
| Genre: | Black metal, dark ambient |
| Length: | 55:13 |
| Label: | Hydra Head |
| Prev Title: | All Reflections Drained |
| Prev Year: | 2009 |
| Next Title: | Subject to Change |
| Next Year: | 2016 |
Portal of Sorrow is the eighth studio album by American black metal act Xasthur. It would be Xasthur's last album of the black metal genre, as the next album Subject to Change features a more acoustic folk sound.