Cambodian citizenship is granted to those born to at least one Khmer parent regardless of the place of birth.
Alternatively, individuals will need to have lived in the country for at least seven years with a residence card in order to obtain Cambodian citizenship by naturalisation. Apart from being able to speak and write fluently in Khmer, applicants will also need to have brushed up on their knowledge of Cambodian history. They will have to sit through an exam to prove their proficiency in these areas.
In contrast, upon marrying a Cambodian spouse, an individual may apply for citizenship after three years of living together, provided the marriage has been properly registered.
According to Article 11 of the Law of Nationality, a foreigner may be bestowed with Cambodian citizenship should they invest 1.25 billion riels (about USD 312,500) in Cambodia. In this case, the seven-year residency is waived. Foreigners who make a donation in cash to the national budget of at least 1 billion riels (USD 250,000), may also file an application for citizenship. Currently, the law is being amended.
Cambodia imposes no restrictions on dual citizenship. In fact, Cambodia has permitted dual citizenship since 1996.