Oum Hadjer
| Oum Hadjer أم هاجر | |
|---|---|
| Coordinates: 13°17′40″N 19°41′29″E / 13.29444°N 19.69139°E | |
| Country | Chad | 
| Region | Batha | 
| Department | Batha Est | 
| Sub-Prefecture | Oum Hadjer (أم هاجر) | 
| Elevation | 1,180 ft (360 m) | 
| Time zone | +1 | 
Oum Hadjer (Arabic: أم هاجر) is a small city in Chad, and the capital of Batha Est Department. It straddles the ephemeral Batha River, lies on the main road between Khartoum and N'Djamena, and has a small airport.
Strategically located, it has been contested by government and rebel forces in 1982, 1990, and January 2008.
Oum Hadjer is also the name of the Sub-Prefecture that the city is within. The population of the entire Oum Hadjer Sub-Prefecture is about 14,500.
The town is served by Oum Hadjer Airport.