The Hip Sing Association or HSA (traditional Chinese: 協勝公會; simplified Chinese: 协胜公会; Jyutping: Hip3 Sing3 Gung1wui6), formerly known as the Hip Sing Tong (Chinese: 協勝堂; Cantonese Yale: Hip Sing Tong), is a Chinese-American criminal organization/gang formed as a labor organization in New York City's Chinatown during the early 20th century (perhaps c. 1904). The Cantonese name "Hip Sing" (協勝) translates roughly to "cooperating for success." The Hip Sing Tong, along with their rivals the Four Brothers and the On Leong Tong, would be involved in violent Tong wars for control of Chinatown during the early 1900s. During the 1930s and 1940s, 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). Recently some branches have begun to transform back into the legitimate fraternal organization they started as over a century prior.
Like many Tongs, it was founded to protect its members from the rampant anti-Chinese prejudice that was common in America at a time, and provide them with a semi-legitimate community structure since they could not rely on police or court systems to resolve internal community disputes. Also like many other Tongs, it eventually became involved in vice in order to fund its operations. While it is arguably most famous for its war with the On Leong Tong in Manhattan's Chinatown, the group that would become the Hip Sing Tong did not actually originate within New York but rather on the West Coast within San Francisco. It moved into New York City in the late 1800s, and soon began to compete with the On Leong Tong for local control under the guidance of its then-leader Sai Wing Mock. This rivalry would eventually erupt into decades of violence, a part of a nationwide conflict between Tongs known as the Tong Wars. 
In the last fifty to sixty years, efforts began from within the group to clean up their public image by obfuscating their illegal activities, and in several chapters this would transform into a genuine attempt to become a purely law-abiding organization. There were clear transfers of illegal activities to plausibly deniable associated street gangs, like in New York City where the Hip Sing Tong secretly used the Flying Dragons (gang) to carry out crimes in their stead. However, due to crackdowns, the links between the Hip Sing Association and their gangs become increasingly frayed and some sources believe that the gang had fully broken out of Hip Sing control as early as 1994 .
Since the late 1990s, branches of the group have turned their original attempts at plausible deniability into a genuine trend towards becoming fully law-abiding fraternal organizations like other Tongs. The NYC HSA is a permanent member of the Chinese Consolidated Benevolent Association and has gotten HSA officer Eric Ng elected president of the organization. Under his presidency, the CCBA has specifically focused on public outreach and fostering direct cooperation between the CCBA and the NYPD to counter gangs and street crime , and members of the NYPD regularly appear at CCBANY-hosted public events to meet with Eric Ng and other members to discuss neighborhood issues and educate the public. 
However, other branches have seemingly remained involved with organized crime. In contrast to the positive public relationship between the NYC branch and the NYPD, as recently as 2018 a representative of the Chicago police refused to publicly discuss their cities' HSA chapter with a journalist due to "ongoing gang investigations". And on the West Coast the Portland branch was subject to a major anti-drug trafficking raid by authorities in July of 2012. The secretive nature of the group and apparent relative autonomy between chapters makes it difficult to determine how individual chapters actions reflect on the current trajectory of the group as a whole.
The Hip Sing Association has several branches in the United States including in: