Vietnam's government is working on a plan to extend the validity of tourist visa for US citizens from three months to one year in a bid to attract more arrivals, Vietnam News Agency reported.
The report, however, did not indicate any timeframe.
It quoted tourism minister Hoang Tuan Anh as saying at a meeting with the US State Department on Monday that Vietnam aims to bring the annual number of US arrivals to one million by 2017.
Last year US arrivals hit 443,776, up nearly 3 percent from 2013.
Currently, a general tourist visa to Vietnam for US citizens is valid for 30 or 90 days, with single or multiple entries.
Between January and July this year, Vietnam attracted 301,907 US tourists.
Tuan also said the United States has become the largest foreign investor in Vietnam's tourism sector over the last few years.
Vietnam is easing its visa policy this year as it tries to boost the tourism sector after consecutive declines in arrivals. It has recently offered visa waivers to five European countries and has also announced plans to let overseas Vietnamese enter freely without a visa.