Unlike Japan and Thailand, this one's a clear yes: US passport holders do need a visa to enter Vietnam. The good news is that it's an e-visa you apply for entirely online before you fly — no consulate visit — and since 2023 it's become genuinely straightforward. Here's how it actually works, and the one thing to be careful about. (This is for US citizens traveling for tourism; rules and the official portal change, so verify against Vietnam's official immigration site before applying.)
Vietnam does not grant US citizens visa-free entry, so yes — you need a visa. For almost everyone that means the e-visa: an electronic visa you apply for online, valid for up to 90 days, available as either single- or multiple-entry. That 90-day, multiple-entry option (introduced in 2023) is a real upgrade over the old 30-day single-entry rule, and it's what makes Vietnam workable for a longer, in-and-out-of-the-country itinerary.
Some nationalities get a short visa exemption on arrival; US passport holders are not among them, so don't rely on the exemption lists you might see for other travelers.
You apply on the official government e-visa portal, upload a passport photo and a scan of your passport bio page, choose single or multiple entry and your intended entry point, pay the fee by card (currently around US$25 for single entry, US$50 for multiple), and wait — processing is typically three to five business days, so apply one to two weeks out rather than the night before. Your passport needs at least six months of validity and a couple of blank pages. You get the visa back as a PDF; print a copy and also keep it on your phone, because you'll show it on entry.
The single most important thing: apply on the actual government site, not one of the many look-alike agency sites that rank in search and charge a large markup (or, worse, mishandle your details). Look for the official Vietnamese immigration domain and confirm it's a government (.gov.vn) address before entering any information. If a site's fee seems high or its URL looks off, back out.
Bring a passport valid at least six months beyond your entry date, and the printed e-visa. Your permitted stay is whatever the e-visa was issued for, up to 90 days — and unlike a visa-exempt stamp, the e-visa's validity window is fixed at issue, so line up the dates with your actual travel. If you'll leave and re-enter (a quick hop to Cambodia or Laos and back is common), make sure you selected multiple entry when you applied.
For stays beyond the e-visa, or for work, study, or business sponsorship, you're into longer-term visa categories that are arranged differently — plan those well ahead.
Apply for the e-visa early, use only the official portal, and match the visa dates to your itinerary. As with anywhere, carry travel insurance that covers medical care — and given how much of Vietnam people see by motorbike, check that your policy actually covers riding before you rent one. Confirm the current e-visa length, fee, and official URL against Vietnam's immigration authority before you apply, since the system has changed more than once in recent years.
Entry rules change, and they depend on your nationality — always confirm the current requirements on the official government site before you book or apply. Only use official government (.gov) portals; ignore look-alike agency sites.