Ascanius may refer to:
- In Classical mythology:
- Ascanius, a genus of bugs in the subfamily Pachycorinae
- Lake Ascanius in Anatolia.
- Peter Ascanius (1723–1803), Norwegian biologist.
- Domenicus van Wijnen, called Ascanius (1661 – c.1695), Dutch painter.
Ascanius may refer to: