The Icy Strait is a strait in the Alexander Archipelago in southeastern Alaska, at about Coordinates: . The strait separates Chichagof Island to the south and the Alaska mainland to the north. The strait is 64 km (40 mi) from its west side at the intersection of the Cross Sound and Glacier Bay to its east side at Chatham Strait and the Lynn Canal. The two largest islands in the strait are Pleasant Island and Lemesurier Island.
The Cape Spencer Light is an important former lighthouse and currently active aid-to-navigation.