Poptún is a municipality in the El Petén department of Guatemala. It covers an area of 1,128 km2, and had a population of 35,663 at the 2002 Census; the latest official estimate (as at mid-2012) was 64,988. It is some 385 km from Guatemala City. Since 1989, Military Zone 23 in Poptún has been the home of the Guatemalan Army's elite Kaibiles special operations force.