Realtek Semiconductor Corp. is a fabless semiconductor company situated in the Hsinchu Science Park, Hsinchu, Taiwan. Realtek was founded in October 1987 and subsequently listed on the Taiwan Stock Exchange in 1998. Realtek currently manufactures and sells a variety of microchips globally and its product lines broadly fall into three categories: communications network ICs, computer peripheral ICs, and multimedia ICs. As of 2019, Realtek employs 5,000 people, of whom 78% work in research and development.

The Hsinchu Science Park is an industrial park established by the government of Taiwan on 15 December 1980. It straddles Hsinchu City and Hsinchu County in Taiwan.