As compared to Mekong Delta in Vietnam, ethnicity along Mekong River in Cambodia is quite similar. Most of population inhabitants on Mekong riverbank are Khmer people; Chinese, Vietnamese and Cham are some minority groups living among Khmer communities.
The ethnic of Khmer is one of the oldest and most affluent in Cambodia. Khmer people have been settling in Cambodia for more than one thousand years and built up powerful Khmer Empire.
Ancestor of Cham people are those who set up Champa kingdom in the past. From the 7th to 15th century, the relation between the Cham and the Khmer changed from the allies to enemies many times.
The Hoa is the fattest growing ethnic group in Cambodia. From the 18th to 19th century, Chinese descendants started settling in Cambodia at aim of searching for trading and commerce opportunities.
With the population of approximately 2 million, the Vietnamese is the largest ethnic minority in Cambodia. The Vietnamese community started immigrating in Cambodia in the early 20th century.