Tulum Municipality (Spanish: Municipio de Tulum, [muniˈsipjo ðe tuˈlum]) is one of the eleven municipalities that make up the Mexican state of Quintana Roo.

Like most of the Yucatan Peninsula Tulum is entirely flat with a gentle slope towards the sea, so from west to east, the area never reaches an altitude higher than 25 metres (82 ft) above sea level.

The municipality consists of 170 populated localities, plus an additional 224 unpopulated localities, and includes part of a biosphere reserve (Sian Ka'an, which lies mostly in neighboring Felipe Carrillo Puerto Municipality).

[4] There is an additional 15,000 to 20,000 people living and working in Tulum as part of its floating population.

That number rises and falls with the tourist season and is not reflected in the census figures.