Gurdwara Sri Tarn Taran Sahib, Sikh temple in Tarn Taran, India.

Gurdwara Sri Tarn Taran Sahib is a Sikh temple in Tarn Taran featuring a large rectangular water tank spanning about 289 meters on its northern edge, the largest of its kind among all gurdwaras. The complex includes the main sanctuary, visitor accommodations, and a langar kitchen where free meals are prepared daily for all guests.

Guru Arjan Dev bought the land around Tarn Taran for 157,000 mohar, and the tank was dug in Sambat 1647 (1590); when finished it was the largest sarovar in Punjab. Baba Buddha laid the foundation stone of Darbar Sahib. Maharaja Ranjit Singh rebuilt the shrine in 1836–1837, completed the Parikarma and had it gold-plated. In 1905 an earthquake damaged the Lotus Dome, which was soon rebuilt.

Pilgrims gather here each month on Amavas, the no-moon night, when the sarovar is lit and the Guru Granth Sahib is carried in procession around the water. Sikhs hold that the tank's water has healing properties, traditionally credited with curing leprosy. The name Tarn Taran means "boat to cross the ocean of existence".

Visitors can come year-round as daily religious services are held and free meals are served in the langar kitchen. For those traveling from far away, sleeping accommodations are available on the grounds.

In earlier centuries, major restoration work was undertaken in which parts of the structure were covered with gold leaf, transforming the complex into one of the most ornate Sikh sanctuaries. These efforts made it stand out among other gurdwaras for its artistic embellishment.