Tömörbulag (,
iron spring) is a
sum of
Khövsgöl aimag. The area is 2,510 km², of which about 1,950 km² are pasture. In 2000, Tömörbulag had a population of 4,174 people, including some Khotgoid. The sum center, officially named
Jargalant , is located near the
Bügsiin River, 75 south of
Mörön and 714 km from
Ulaanbaatar.