| Louhajang River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Bangladesh |
| Subdivision Type2: | Division |
| Subdivision Name2: | Dhaka |
| Subdivision Type3: | District |
| Subdivision Name3: | Tangail |
| Discharge1 Location: | Bangshi River |
| Source1: | Jamuna River |
| Source1 Location: | Gabsa Ain, Tangail |
| Mouth: | Dhaleshwari River |
Louhajang River (bn| লৌহজং নদী|lauhajaṁ nadī pronounced as /bn/) is located in central Bangladesh. It branches off from the Jamuna near Gabsain at Bhuapur, Tangail District.[1] Thereafter it bifurcates before the two parts meet up again. It flows past Tangail city, Karotia and Jamurki before joining the Bangshi.[2] The Louhajang is linked with the Dhaleshwari.[3]
The average depth of the Louhajang is 30NaN0 and maximum depth is 90NaN0.[4]