Chinatown (Chinese: 唐人街) is a common term used to describe an ethnic enclave of Chinese people located outside of Mainland China, Hong Kong, Macau, and Taiwan, typically situated in an urban area. Chinatowns can be found around the world, including in Europe, Asia, Africa, Oceania, and the Americas. The history of Chinatowns date back to the Tang dynasty in the 10th century, arising from the nation's important role in global trade. Binondo in Manila, established in 1594, is recognized as the world's oldest standing Chinatown. Notable early examples outside Asia include San Francisco's Chinatown in the United States and Melbourne's Chinatown in Australia, which were founded in the early 1850s during the California and Victoria gold rushes, respectively. A more modern example, in Montville, Connecticut, was caused by the displacement of Chinese workers in New York's Manhattan Chinatown following the September 11th attacks in 2001.
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*People of Fujian province used to move over the South China Sea from the 14th century to look for more stable jobs, in most cases of trading and fishery, and settled down near the port/jetty under approval of the local authority such as Magong (Penghu), Hoian (Vietnam), Songkla (Thailand), Malacca (Malaysia), Banten, Semarang, Tuban (Indonesia), Manila (the Philippines), etc. A large number of this kind of settlements was developed along the coastal areal of the South China Sea, and was called "Campon China" by Portuguese account and "China Town" by English account.
Source: Wikipedia