It is located to the southeast of Guana Island in Belfast Bay, close to the town of Seaton's.

The island is a medium-sized of Antigua that lies in the northeastern reef zone.

The island's width varies by about 100 metres, and its length is roughly 1½ kilometres from west to east.

A local group proposed the creation of a Crump Island Coral Reef Marine Park in the 1980s.

The island has been a part of the rather nonspecific North East Marine Management Area (NEMMA, 78 km2) since 2006.