Researchers are increasingly investigating the drinking behavior and associated consequences among Asian-Americans and Pacific Islanders (APIs) in the United States. Among adolescents, APIs generally have lower rates of alcohol consumption and appear to be at lower risk for alcohol abuse compared with other ethnic groups. Similarly, the rates of drinking and heavy drinking have been found to be lower among API college students than among other ethnic groups. Among adult Asian-Americans, Japanese-Americans have the highest and Chinese-Americans have the lowest lifetime prevalence of drinking and heavy drinking. Southeast Asians (e.g., Vietnamese) living in the United States appear to be at high risk for heavy drinking. Numerous factors help determine the drinking patterns of APIs, including their economic status, educational attainment, and degree of acculturation as well as genetic and environmental factors, such as drinking norms and alcohol availability.