Kaigani Strait (also, Kaigahnee, Kaigan, Kaijani) is a waterway in the U.S. state of Alaska, the southern part of the strait between Long Island and Dall Island.
Howkan Narrows is the narrowest part of the passage, with kelp-marked reefs, from American Bay to above Channel Island.
The Kaigani Harbors are three indentations in the shore of Dall Island; they are all exposed southeastward.
American Bay lies on the southwest side of Kaigani Strait, 7 miles (11 km) above Kaigani Point and about 1 mile (1.6 km) southward of Howkan.
Haida people brought to Kaigani furs and other trade goods from a wide area.