From United States, visitors can apply for a visa through one of the embassy of Vietnam in United States below or apply for a Vietnam visa  online. Here below is the specific address of Vietnam Embassy you may concern:

Embassy of Vietnam in Washington DC. – USA

1233, 20th St., NW, Suite 400, Washington DC, 20036, USA
Tel: (1-202) 861 0737 Consular: 861 2293
Fax: (1-202) 861 0917 Consular: 861 0694

Consulate General of Vietnam in San Francisco, USA
1700 California St., Suite 430 San Francisco, CA 94109, USA
Tel: (1415) 922 1577 (1415) 922 1707
Fax: (1415) 922 1848(1415)922 1757

Permanent Mission of Vietnam to the UN
866 UN Plaza, Suite 435, New York, N.Y. 10017, USA
Tel: (1212) 644 0594
Fax: (1212) 644 5732

Besides, citizens in United States can select among 3 options to get visa to Vietnam:

–          Visit Vietnam Embassy in United States or in any other countries to get Vietnam visa done there.

–          Apply for Vietnam visa on arrival at https://vietnamvisaonentry.com/apply-online/ and pick up your visa at one of 3 international airports in Vietnam

–          Apply for Vietnam visa code at https://vietnamvisaonentry.com/apply-online/ and get visa stamped at Vietnam Embassy where you wish to pay a visit to.