Tashichho Dzong (Dzongkha: བཀྲ་ཤིས་ཆོས་རྫོང) is a Buddhist monastery and fortress on the northern edge of the city of Thimphu in Bhutan, on the western bank of the Wang Chu.

It has traditionally been the seat of the Druk Desi (or "Deb Raja"), the head of Bhutan's civil government, an office which has been combined with the kingship since the creation of the monarchy in 1907, and summer capital of the country.

It was then established as the main seat of the Southern Drukpa Kagyu and the summer residence of the monastic body or sangha headed by Shabdrung Rinpoche.

In 1962, after the capital was moved from Punakha to Thimphu, the present Dzong was rebuilt by the third king, Jigme Dorji Wangchuck, as the seat of Government following a different plan from the old one.

In 1777, during the time of the 18th Desi, Jigme Singye, the Kunrey (assembly hall of the monks) in the Dzong was renovated, as it was totally dark inside.