Tay Kak Sie Temple, Chinese temple in Semarang City, Indonesia

Tay Kak Sie is a Taoist temple at Jalan Gang Lombok in Semarang, founded in 1746 and originally dedicated to Guan Yin. Its name, meaning "Temple of Supreme Consciousness", appears on an entrance signboard dated to the reign of Qing Emperor Dao Guang (1821–1850). The complex houses a replica of Admiral Zheng He's ship and his statue, and its many altars make it the temple with the most deities in the city.

The site was founded in 1746 as a sanctuary dedicated to Guan Yin worship. Over time it expanded into a larger complex that incorporated spaces for numerous Taoist deities.

The temple's name, written on the entrance signboard, means "Temple of Supreme Consciousness" and carries the reign years of Qing Emperor Dao Guang (1821–1850). Its main deity is Kwan Im Po Sat, the Goddess of Mercy, and the complex holds the largest number of deities in Semarang, including Sam Po Tay Jin, venerated in connection with Admiral Zheng He, whose ship replica and statue are kept here.

Tay Kak Sie stands on Jalan Gang Lombok in Semarang's old Chinatown, a narrow lane best reached on foot. The temple is an active house of worship, so visitors should dress modestly and keep voices low around the altars. A fire on 21 March 2019 destroyed the ash house beside the temple and killed one person, so parts of the neighbouring compound may still be closed off.

The entrance signboard bears markings from the reign of Emperor Dao Guang dating between 1821 and 1850, linking the temple directly to the Qing Dynasty. This ancient artifact on the facade connects the building to imperial China.