The Royal Embassy of Cambodia in Washington, D.C. publishes a page called, plainly, “How to Get a Visa.” It is short, and it is honest about its own scope: it tells you how to apply for a Cambodian visa in person, at that embassy, in that city. It is not an explainer of Cambodia’s e-Visa system or its visa-on-arrival option, and we are not going to pad this article with what we know about those from elsewhere. This guide only states what the embassy’s own page says.
Two rules that apply no matter how you apply
The page sets out two conditions that hold regardless of route. Issued visas are not refundable or transferable — once you have one, it is yours alone, and paying for it is final. Separately, your passport must be valid at least six months, based on its expiration date, prior to your travel entry date to Cambodia.
The one exemption the embassy names, and the one it doesn’t
The page states that travelers from ASEAN member countries, “and other countries traveling with their valid national passport that does not required visa to enter Cambodia,” can enter without a visa. That is the whole sentence, grammar and all.
It never says which “other countries.” The page does not name the United States anywhere. If you are an American reader wondering whether that clause covers you, the embassy’s own text does not answer the question — and we are not going to guess on its behalf.
If you are applying at the embassy itself
For readers actually visiting in person, the page is more precise. The embassy is open 9:00 am–12:00 pm and 2:00–5:00 pm, Eastern Time, Monday to Friday. Its entrance is on Buchanan Street, at the corner of 16th Street. The nearest Metro stop is Columbia Heights, on the Green or Yellow Line, and the S9 Express, S1, S2 and S4 buses, running the 16th Street route, stop at Buchanan Street.
US visa need and e-Visa cost or timing go unanswered
It does not state whether Americans need a visa to enter Cambodia at all, and it says nothing about an e-Visa application, its cost, or its processing time — this page describes only the in-person route through the embassy. For anything beyond that, you need a different official source than the one this article is built on, and we have not verified one yet.
Bring a six-month passport and confirm your own exemption
If you are applying through the embassy in Washington, arrive during posted hours with a passport valid at least six months past your travel date, and expect to pay for a visa that cannot be refunded once it is issued. If you are hoping the ASEAN exemption covers you, the embassy’s own page will not tell you either way — confirm your specific nationality’s requirement before you rely on it.