The Vietnam Association of Motorcycle Manufacturers (VAMM) said its members sold 2,849,000 motorbikes last year, or an average of 7,805 a day.
The number was up 5.5 percent from 2.7 million in 2014, and was the first increase since 2011.
Honda continued to be the most popular brand accounting for 70 percent of the sales, thanks mostly to the mid-range Wave models. Yamaha came second, followed by SYM.
The consumption peaked in January and December, each with around 300,000 motorbikes sold.
VAMM expects sales to hover at the same level this year as manufacturers are not launching new products.
Motorbike is the most popular means of transport in the 90-million-strong Vietnam, where public transport does not receive adequate interest and investment.
Figures released late last year showed that Hanoi has more than 600 motorbikes registered every day while the number in Ho Chi Minh City was 750.