Karimganj falls within the Barak Valley, a region culturally distinct from the Brahmaputra Valley of Assam. The dominant culture and language are Bengali, specifically the Sylheti dialect.
* **Festivals**: Durga Puja is the most vibrantly celebrated festival, marked by elaborate *pandals* (temporary shrines) and street processions. * **Literature and Arts**: The city honors literary figures with events like Rabindra Jayanti (celebrating Rabindranath Tagore). Local theater, folk music (such as Baul and Bhatiali), and handloom weaving remain integral parts of the cultural fabric.