Sunamganj-1 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh. Since 6 August 2024, the constituency remains vacant.
The constituency encompasses Dharamapasha, Jamalganj, Tahirpur, and Madhyanagar upazilas.
The constituency was created in 1984 from a Sylhet constituency when the former Sylhet District was split into four districts: Sunamganj, Sylhet, Moulvibazar, and Habiganj.