Tecomán is a city and seat of the municipality of Tecomán in the Mexican state of Colima, about 50 km south of the city of Colima. In the 2005 census the city had a population of 112,726 people. It is the third-largest community in the state of Colima. The municipality has an area of 834.77 km2. Near the coast on Federal Highway 200, it is situated a rich agricultural industries region and is known as the "lime capital of the world". Due to its soaring homicide rate, Tecomán became the deadliest municipality in Mexico in 2016.

Colima, located in central−western Mexico, is the capital of the state of the same name and the seat of the municipality of the same name. It is located near the Colima volcano, which divides the state from Jalisco. Colima is the state's second largest municipality by population after Manzanillo.