Hsinchu is a city located in northwestern Taiwan. It is the most populous city in Taiwan that is not a special municipality, with estimated 450,65…Hsinchu is a city located in northwestern Taiwan. It is the most populous city in Taiwan that is not a special municipality, with estimated 450,655 inhabitants. Hsinchu is a coastal city bordering the Taiwan Strait to the west, Hsinchu County to the north and east, and Miaoli County to the south. Hsinchu is nicknamed the Windy City for its strong northeastern monsoon during the autumn and winter seasons.