Kind of. Although the riel is Cambodia’s official currency, US dollars are used almost universally. As a tourist, you can pay with US dollars absolutely everywhere—from hotels to market stalls. In fact, the prices of goods and services targeted at tourists are almost always listed exclusively in US dollars. However, since only bills are used, change is given in small denominations of riels (as pictured). The bottom line: do not exchange your money to riels before coming to Cambodia, and once in the country withdraw US dollars from ATMs. Otherwise, carrying around a huge wad of riels and having to constantly ask for prices in the currency is sure to get annoying.