Cancún (Spanish pronunciation: [kaŋˈkun]) is a coastal city in Mexico's easternmost state, Quintana Roo, on the Yucatán Peninsula. Cancún is located on the Yucatan Channel that separates Mexico from the island of Cuba in the Greater Antilles. The Cancún region is sometimes known as the Mexican Caribbean.

Cancún is the municipal seat of the Benito Juárez municipality and a world-renowned tourist resort. The city center is located on the mainland which connects the Nichupté and lagoons to a narrow 7-shaped island where the modern beachfront hotels are located. The island of Isla Mujeres is located off the coast and is accessible by boat from Puerto Juárez.