Winslow Reef is an underwater feature of the Phoenix Islands, Republic of Kiribati, located 200 km north-northwest of McKean Island at (01°36′S174°57′W). It is the northernmost and westernmost feature of the Phoenix Islands, not counting the outlying Baker and Howland Islands. It has a least depth of 11 metres. The reef is about 1.6 km long east-west, and about half that wide. The bottom is pink coral and red sand.