Guatemala City's 2026 population is now estimated at 914,057. In 1994, the population of Guatemala City was 823,301. Guatemala City experienced a decrease of -1,162 residents over the past year, marking an annual decline of -0.13%. These population values and projections come from CityPopulation Guatemala cities and towns census series (1994, 2002) fallback access, INE Guatemala Censo 2018 A1.2 municipio urban population and World Population Review Internal Projections .