Chan is a non-pinyin romanisation of multiple Chinese surnames, based on different varieties of Chinese.
Among respondents to the 2000 United States census, Chan was the 12th-most common surname among Asian Pacific Americans, and 459th-most common overall, with 59,811 bearers (91.0% of whom identified as Asian/Pacific Islander).[1] Chan was the ninth-most common Chinese surname in Singapore as of 1997 (ranked by English spelling, rather than by Chinese characters). Roughly 48,400 people, or 1.9% of the Chinese Singaporean population, bore the surname Chan.[2]