Isla Mujeres (Spanish pronunciation: ['izla mu'xeɾes], Spanish for "Island of Women” (formally “Isla de Mujeres”)) is an island where the Gulf of Mexico and the Caribbean Sea meet, about 13 kilometres (8.1 mi) off the Yucatán Peninsula coast. The island is approximately 7 kilometres (4.3 mi) long and 650 metres (2,130 ft) wide. To the east is the Caribbean Sea with a strong surf and rocky coast, and to the west the skyline of Cancún can be seen across the clear waters. In the 2010 census, the namesake town on the island had a population of 12,642 inhabitants.

The island is part of the Isla Mujeres Municipality in the State of Quintana Roo, Mexico and includes an impoverished colonia on the mainland.