Tosontsengel (Mongolian: Тосонцэнгэл, meaning 'Oil happiness') is a sum of Zavkhan Province (aimag) in western Mongolia.

Outside of the main sum are two large fields owned by a foreigner, Tom Phillips, which provide most of the vegetables for the town.

The people who live in the sum center operate stores, drive trucks, or leave to mine in the summer months.

As the nomadic lifestyle becomes more difficult, more young people are leaving the sum for the capital city to attend university and find jobs.

The airport has not been used often since 2007, with the main users being a medical airplane flown by Blue Sky and the annual crop duster plane that has been combatting the moths that are destroying the forests.