Wat Umong Maha Thera Chan (Thai: วัดอุโมงค์มหาเถรจันทร์, RTGS: Wat Umong Maha-then Chan) is a Buddhist temple in Chiang Mai, northern Thailand.

Wat Umong Maha Thera Chan traces its origins back to 1367 during the reign of King Kuena (1355–1385), the sixth king of the Mangrai Dynasty.

Originally named Wat Pho Noi, its name was changed during rebuilding works in 1910 to Wat Umong Maha Thera Chan after a renowned monk, Mahathera Chan, who lived in Chiang Mai during the 14th and 15th centuries and who frequently visited the site.

The principal Buddha image (Phra Phuttha Patimokorn) dates from the same period.

The small ordination hall is guarded by a pair mythical beasts called mom, regarded as some of the finest examples of naga-makara art in Lan Na, and includes finely carved wooden doors and windows, and murals featuring scenes from the life of the Buddha.