Yes, as of March 2026, U.S. citizens are required to have a valid visa to enter Vietnam for any purpose, including tourism, business, or transit that involves leaving the airport. While Vietnam has expanded its visa waiver program for several European and Asian nations, the United States is not currently on the exemption list. The most convenient option for most American travelers is the e-Visa (Electronic Visa), which can be applied for online and is typically valid for up to 90 days with single or multiple entry options. The processing time usually takes about three to five business days. It is critical that your passport has at least six months of validity remaining and at least two blank pages upon arrival. For those planning long-term stays or business ventures, a traditional visa can be obtained through the Vietnamese Embassy or Consulate. Always ensure you apply through the official government portal to avoid scams and ensure your documentation is legally recognized at all points of entry.