Knight Island () is an island 1.5 nautical miles (2.8 km) long, lying 1 nautical mile (1.9 km) west of Reeve Island in the Wauwermans Islands, in the Wilhelm Archipelago. The island was shown on an Argentine government chart of 1950. It was named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1958 after one of the characters in Chaucer's Canterbury Tales.
This article incorporates public domain material from the United States Geological Survey document "Knight Island" (content from the Geographic Names Information System).