San MartÃÂn Sacatepéquez () is one of 24 municipalities in the department of Quetzaltenango, Guatemala. San MartÃÂn Sacatepéquez has a surface area of . The center of the town is situated at above mean sea level. According to the 2000 government survey, it had 28,926 inhabitants.
San MartÃÂn Sacatepéquez is located on the edge of the volcanic chain that divides the Western Highlands of Guatemala from the coastal plain. Just below the volcanic chain, to the southwest, the rich Boca Costa (piedmont) soils extend toward the Pacific Ocean. The Boca Costa occupies the warmer more tropical lands from above sea level. To the northeast lies the altiplano, the elevated pumice-laden volcanic highlands. The altiplano encompasses the colder territory found at higher elevations, ranging from above sea level to the peak of the Siete Orejas Volcano, San MartÃÂn's highest point at above sea level. The town is also known as San MartÃÂn Chile Verde, due to the large quantity of green chili peppers its farmers historically grew and brought to Quetzaltenango to sell. As is true throughout much of the highlands of Guatemala, in San MartÃÂn weather is divided into two seasons: the rainy seasonâÂÂwhich lasts from early May to early NovemberâÂÂand the dry seasonâÂÂwhich lasts from early November to early May.
San MartÃÂn Sacatepéquez is predominantly inhabited by Indigenous peoples of Maya, Mam descent. Linguistically, San MartÃÂn is part of the Southern Mam speaking region of Guatemala. The Laguna Chicabal, a crater lake and holy site for the Mam, is located within the municipal boundary of San MartÃÂn. San MartÃÂn is also notable due to the colorful traditional garb (known in Guatemala as ) still worn by the residents. Although most Maya men throughout Guatemala have adopted Western clothing, a large population of men in San MartÃÂn still wear traje.