At the top of the list is Hanoi, with just US$18.29 needed a day for backpackers, followed by Ho Chi Minh City with $19.47.
The ancient city of Hoi An in the central province of Quang Nam ranked 8th on the list with a daily budget of $21.20.
Price of Travel ranked 137 major cities in the world based on the minimum amount of money budget travelers would need to spend a night in the cheapest bunk bed, two public transport rides, and entrance fee to one top attraction, and three simple meals and beer.
Vietnam recently added 35 countries to the list of those whose nationals can visit the country with an e-visa.
With new changes to the visa policies, Vietnam’s tourism industry hopes to welcome 17-20 million foreign visitors by 2020, earning revenue of $35 billion a year and contributing 10 percent to the country’s GDP.