Of the number, 1.88 million visitors are from China, 1.06 million from South Korea, 378,844 from Japan and 297,852 from Taiwan (China).
Visa exemption program has raised the number of visitors from the European market to Vietnam by 15.8 percent.
The number of visitors from China increased most by 56.7 percent, Russia 53.4 percent, South Korea 43.9 percent and Cambodia 35.5 percent.
Hong Kong (China) surged 29.9 percent, Spain 28.6 percent, the Philippines 24.3 percent, Taiwan (China) 22.9 percent, Laos 22.4 percent, New Zealand 19 percent and Australia 10 percent.
Domestic visitors reached 40.7 million in the first half this year.
Tourist revenue totaled VND254.7 trillion (US$11.2 billion), a year on year increase of 27.1 percent.