The population of Cambodia makes the country makes it one of the smallest countries of Asia. In fact other than that of Laos and Singapore, the population of Cambodia's is lesser than that of all other South East Asian countries.

The population of Cambodia is very ethically homogenous. Almost ninety percent of the population of Cambodia of Khmer origins or belong to the Khmer ethnic group. The rest of the population is composed of people of Chinese, Vietnamese, Cham, Khmer Loeu, and Indian ethnic groups. A lot primitive tribe are also apart of the minority.

The dominant religious group is those who follow Theravada Buddhism. Though this religious group was persecuted and suppressed by the Khmer rouge, the religion has experienced a revival since then. About five percent of the population practice Islam and two percent of the population of Cambodia practice Christianity.

The median age of the population in Cambodia is 20.6 years, with more than 50% of the population younger than 25. It is said that this is probably a result of continuous civil war and its aftermath. The sex ration of males to females stands at 0.95 which is the most female biased sex ration in the Greater Mekong Subregion.

The primary linguistic group here is also the Khmer language speaking group. French is also commonly spoken here.