Satyrium calanus, the banded hairstreak, is a butterfly in the family Lycaenidae.

The banded hairstreak is a common hairstreak east of the Rocky Mountains in North America. It is a territorial butterfly that will challenge other butterflies invading its territory.

Eggs are laid singly on the host plants and hatch in the spring. There is a single brood that flies early June to late August.

Host plants include oak, hickory, and walnut (especially butternut).

- Edwards' hairstreak (S. edwardsii) - Hickory hairstreak (S. caryaevorum)