Map of visa exemption policy for popular passport holders (Source: Wikipedia)
Visa exemption policy for overseas Vietnamese national who holds a foreign passport:
Holders of Certificates of Visa Exemption do not require a visa regardless of nationality. A Certificate of Visa Exemption is valid for up to 5 years or up to 6 months before the passport expiration date (whichever is shorter). This is available for Vietnamese residing abroad or spouses or children of Vietnamese citizens or Vietnamese residing abroad. The exemption is valid for up to 180 consecutive days of stay and can be extended for a further 180 days. There is no limit placed on the number of entries or exits during the stay or minimum waiting time needed between every 180 days of stay.
Visa exemption policy for holders of a non-popular passport:
Holders of diplomatic or service passports of Afghanistan, Albania, Algeria, Angola, Argentina, Armenia, Azerbaijan, Bangladesh, Belarus, Bolivia, Brazil, Bulgaria, Chile, China, Colombia, Costa Rica, Côte d’Ivoire, Croatia, Cuba, Cyprus, Dominican Republic, Ecuador, Egypt, El Salvador, France, Germany, Hungary, India, Iraq, Italy, Japan, Kazakhstan, Kuwait, Mexico, Moldova, Mongolia, Montenegro, Morocco, Mozambique, Myanmar, Nicaragua, North Korea, Pakistan, Panama, Paraguay, Peru, Philippines, Romania, Russia, Serbia, Seychelles, Singapore, Slovenia, South Africa, South Korea, Spain, Sri Lanka, Sudan, Tanzania, Tunisia, Turkey, Ukraine, United Arab Emirates, Uruguay, Venezuela, and holders of diplomatic passports only of Czech Republic, Estonia, Israel, Malta, Poland, Slovakia, Switzerland and Uzbekistan do not require a visa to visit Vietnam.
Visa waiver agreements for diplomatic and service passports were signed with Ethiopia in August 2018, Greece in July 2018, Namibia on 19 Nov 2013 and Cameroon in December 2017 but have not come into force.
Visa free access for diplomatic and official/service category passports
Visa free access for diplomatic passports
Map of Vietnam visa exemption policy for non-popular passport holders (Source: Wikipedia)
Visa exemption policy for those traveling to Phu Quoc Island:
All travelers who directly visit Phu Quoc Island from a third country will be exempted from Vietnam visa requirements for up to 30 days. Travelers who are not exempted from visa requirements can visit Phu Quoc without a visa for up to 30 days.