Asian Americans are Americans of Asian descent. The term refers to a panethnic group that includes diverse populations, which have ancestral origins in East Asia, Southeast Asia, or South Asia, as defined by the U.S. Census Bureau. This includes people who indicate their race(s) on the census as "Asian" or reported entries such as "Asian Indian, Thai, Chinese, Filipino, Korean, Pakistani, Japanese, Vietnamese, and Other Asian". Asian Americans with no other ancestry comprise 5.4% of the U.S. population, while people who are Asian alone, and those combined with at least one other race, make up 6.8%.
Although migrants from Asia have been in parts of the contemporary United States since the 17th century, large-scale immigration did not begin until the mid-18th century. Nativist immigration laws during the 1880s–1920s excluded various Asian groups, eventually prohibiting almost all Asian immigration to the continental United States. After immigration laws were reformed during the 1940s–60s, abolishing national origins quotas, Asian immigration increased rapidly. Analyses of the 2010 census have shown that Asian Americans are the fastest growing racial or ethnic minority in the United States.