Zhubei is a city in Hsinchu County of the streamlined Taiwan Province, Republic of China. It is one of the fastest-growing settlements in Taiwan, with a population gain of 51,000 between 2010 and 2019, the highest of any township/city or district. The city has attracted migration both because of its proximity to Hsinchu City and the Hsinchu Science and Technology Park, and because the Hsinchu County government has focused most of its infrastructure here.

Hsinchu County is a county administered as part of the nominal Taiwan Province of the Republic of China (ROC). Located in north-western Taiwan, the population of the county is mainly Hakka; with a Taiwanese aboriginal minority in the southeastern part of the county. Zhubei is the county seat, where the government office and county office is located. A portion of the Hsinchu Science Park is located in Hsinchu County.