Choi is a Korean family surname. As of the South Korean census of 2015, there were around 2.3 million people by this name in South Korea or roughly 4.7% of the population. In English-speaking countries, it is most often anglicized Choi, and sometimes also Chey, Choe or Chwe. Ethnic Koreans in the former USSR prefer the form Tsoi (Tsoy) especially as a transcription of the Cyrillic Цой.