Several Southeast Asian countries, including Cambodia, Timor-Leste, Laos, the Philippines, and Thailand, allow dual citizenship.

In Cambodia, dual citizenship has been permitted since 1996, though exceptions exist for individuals seeking top government positions. This means that Cambodians can hold citizenship in another country without forfeiting their Cambodian citizenship.

Timor-Leste permits dual citizenship, allowing individuals to acquire it through birth, descent, or naturalization. This flexibility enables people with connections to Timor-Leste to maintain citizenship ties with other countries.

Laos offers honorary citizenship to significant investors who contribute to the country's economy. To qualify, investors must make a substantial investment of at least $1.5 million, granting them certain privileges and rights within Laos.

The Philippines allows dual citizenship through various naturalization processes, enabling individuals to acquire citizenship in addition to any other citizenship they hold. Additionally, children with at least one Filipino parent are automatically granted citizenship, regardless of their country of birth.

Thailand also permits dual citizenship under specific criteria, such as holding permanent residency and having a history of employment within the country. This allows individuals with ties to Thailand to maintain citizenship in another country while still enjoying the benefits of Thai citizenship.