 The figures listed in the table below are based on the most recently published Commune Database.However, the population in Phnom Penh and other major urban centres, such as Siem Reap, Battambang, and Preah Sihanouk will be underestimated; while the population in smaller provincial municipalities, particularly those on the border with Thailand, Laos and Vietnam, will be overestimated.The most accurate information is available in the 2019 census, which provides information on the 'de-facto' population i.e.