The government will continue to control population growth in the country, setting a target of 100 million by 2020.
A nationwide program will encourage birth control measures, especially in rural and poor areas, according to a statement published on the government website Friday.
The program will be "persistent" in trying to keep the number of children in each household to one or two. It will also seek to redress the current gender imbalance, the statement said.
Vietnam had 85.8 million people in 2009 and 49.4 percent of them were male, according to a census report released last month.
People aged between 15 and 64 made up 69 percent of the population, compared with 61 percent a decade before that.
The country is set to have between 115 million and 120 million people in the middle of this century.
Experts have said that Vietnam's population is now in a golden era that offers huge opportunities to maintain stable economic growth.