Ap Chau (Chinese: 鴨洲), meaning "duck island", also known as Robinson Island, is an island in the Crooked Harbour, in the north-eastern New Territories of Hong Kong. It is located in Ap Chau Bay (鴨洲海) and is under the administration of North District. The island had 8 inhabitants as of June 2008.
Robinson Island was named after Hercules Robinson, 1st Baron Rosmead, who was the 5th Governor of Hong Kong from 1859 to 1865.