Gaibandha-1 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh. Since 13th February, 2026, This constituency is represented by Md. Majedur Rahman, a member of Bangladesh Jaamat-e-Islami.
The constituency encompasses Sundarganj Upazila.
The constituency was created in 1984 from a Rangpur constituency when the former Rangpur District was split into five districts: Nilphamari, Lalmonirhat, Rangpur, Kurigram, and Gaibandha.
Golam Mostafa Ahmed died in December 2017. Shamim Haider Patwary of the Jatiya Party (Ershad) was elected in a March 2018 by-election.
Manjurul Islam Liton was murdered in December 2016. Golam Mostafa Ahmed of the Awami League was elected in a March 2017 by-election. He defeated Jatiya Party (Ershad) candidate Shamim Haider Patwary, Jatiya Party (Monju) candidate Waheduzzaman, and four other contenders.