The Hip Sing Association (Chinese: 協勝公會; Cantonese Yale: Hip Sing Gung Wui) formerly known as the Hip Sing Tong (Chinese: 協勝堂; Cantonese Yale: Hip Sing Tong) was a Chinese-American criminal organization based in New York's Chinatown during the early 20th century. They, along with their rivals the Four Brothers and the On Leong Tong, would be involved in the violent Tong wars for control of Chinatown during early 1900s. During the 1930s and 40s, the Hip Sings were involved in drug trafficking operations with the Kuomintang (KMT) and later the Office of Policy Coordination (OPC). They would later establish chapters in Chinese-American communities throughout the United States in major cities such as Chicago, Seattle and San Francisco (the latter being subject to a major drug raid by authorities in 1996). On July 12, 2012, a major drug raid by authorities took place at the Portland, Oregon, branch.