Cozumel (Mayan: Island of the Swallows) (Kůutsmil in Modern Maya) is an island in the Caribbean Sea off the eastern coast of Mexico's Yucatan Peninsula, opposite the Playa del Carmen, and close to the Yucatan Channel. It is one of the eight municipalities (municipios) of the state of Quintana Roo. Cozumel is a popular tourist destination renowned for its scuba diving and snorkeling. The main town on the island is San Miguel de Cozumel.
The island is about 48 km (30 miles) north-south and 16 km (10 miles) east-west, and is the largest Atlantic island of Mexico. (It is the third-largest island in Mexico, following Tiburón Island and Isla Ángel de la Guarda.) It is about 20 kilometers (12 miles) from the mainland, and some 60 km (36 miles) south of Cancún. The vast majority of the population of Cozumel lives in the town of San Miguel (pop. 71,401 in 2005), which is on the western shore. The rest of the island is low, flat, and densely vegetated. The island, including offshore islets, has a land area of 477.961 km˛ (184.54 sq mi). The municipality, which includes two small areas on the mainland enclaved within the Municipality of Solidaridad with a land area of 10.423 km˛ (4.024 sq mi), has a total land area of 488.384 km˛ (188.566 sq mi). The two areas enclaved on the mainland are Calica, near Playa del Carmen and Xcaret, and the Xel-Há Water Park, near the Xelha archaeological ruins.