Petrof Bay is a small bay on the west side of Kuiu Island in the Alexander Archipelago in southeastern Alaska, United States. It is located at 56°N 134°W / 56°N 134°W / 56; -134 and opens into the Chatham Strait.

Petrof Bay
Petrof Bay is located in Alaska
Petrof Bay
Petrof Bay
LocationAlaska
Coordinates56°24′10″N 134°03′48″W / 56.40278°N 134.06333°W / 56.40278; -134.06333
TypeBay

The bay was named in 1924 for U.S. Census Bureau employee Ivan Petrof, whose reports of his travels in the late 19th century are a valuable source of Alaska history for that period.

The US Navy aircraft carrier USS Petrof Bay, launched in January 1944, was named after it.