Holtek Semiconductor (Chinese: 盛群半導體股份有限公司) is a Taiwan-based semiconductor design centre and provider with its headquarters and design operations based in the Hsinchu Science Park in Taiwan, and has sales offices located the United States and India.

[1] Holtek's design focus is in both 32-bit and 8-bit along with Touch microcontroller development, and as of 2022 the firm employed 631 employees.

In 1988 the company moved to the Hsinchu Science Park under the name of Holtek Microelectronics and began also its combined manufacturing and design operations.

All have common features such as timers, external interrupts, power-down functions, low-voltage reset, bi-directional I/O pins etc.

Some of Holtek's ICE In-Circuit Emulators also include an integrated device programmer eliminating the need for separate programming tools.