The Surma (Bengali: সুরমা নদী, romanized: Śurmā nôdī, Sylheti: ꠍꠥꠞꠝꠣ ꠉꠣꠋ, romanized: Surma gaṅ) is a major river in Bangladesh, part of the Surma-Meghna River System.

It ends in Kishoreganj District, above Bhairab Bāzār,[1] where the two rivers rejoin to form the Meghna River, which ultimately flows into the Bay of Bengal in Bhola District.

This is where the river enters the Sylhet Depression (or trough) which forms the Surma Basin.

The Kushiyara is also known as the Kalni River after it is joined by a major offshoot (distributary) from the Surma.

This article related to a river in Bangladesh is a stub.