San Marcos has a population of 47,063, making it the 43rd largest place we list in Guatemala.
San Marcos holds 0.25% of Guatemala's 18,967,978 people. Guatemala City, the largest place we list there, is 21 times its size. Twenty years earlier the World Gazetteer recorded 24,571, a rise of 92%.
The 2005 figure comes from the World Gazetteer archive restored on this site. The two sources may draw the settlement's boundary differently, so treat the change as indicative rather than exact. Why figures differ.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Asunción Mita | Jutiapa | 48,297 |
| Colomba | Quetzaltenango | 47,544 |
| Barberena | Santa Rosa Department | 47,093 |
| Antigua Guatemala | Sacatepéquez | 46,054 |
| Sololá | Sololá | 45,373 |
| Masagua | Escuintla | 45,323 |
Figures are the latest available in GeoNames (CC BY 4.0), which draws on national censuses of varying dates — treat them as recent, not same-year. Country totals are UN World Population Prospects 2024 (medium variant) where the UN lists the country separately; the handful it reports under a parent state keep a GeoNames figure and are marked as such. Sources & method.