The estimated 2010 population of Cambodia is 15,050,000. There are 42 people groups in Cambodia; 30 groups remain unreached, at 71.4% of the population. A people group is defined as "A significantly large sociological grouping of individuals who perceive themselves to have a common affinity with one another," whether it be language, ethnicity, or impairment such as deafness, etc.
In many parts of the world lack of understandability serves as the main barrier to evangelism; however, in Cambodia and other parts of Southeast Asia, acceptance is a greater barrier than understandability. 85.1% of Cambodians claim to be Buddhist; however, similar to Christianity in the States, many Buddhists are nominal (one who claims to be Buddhist but is non-practicing) or are "holiday Buddhists" (ie. attend the wats on Buddha Day and other major Buddhist holidays.) 7.8% follow ethnic religions, 2.1% are Islamic, 1.3% claim Christianity (of which .5% are Evangelistic), .2% are Hindus, and the remaining percentage is other, non-religious, or unknown.
Click HERE to read more statistics and information about the unreached people groups of Cambodia.