| Brahmanbaria-1 | |
| Parl Name: | Jatiya Sangsad |
| District: | Brahmanbaria District |
| Region Label: | Division |
| Region: | Chittagong Division |
| Electorate: | 214,039 (2018) |
| Year: | 1984 |
| Members Label: | Member of Parliament |
| Members: | Vacant |
| Party Label: | Parliamentary Party |
| Party: | None |
| Blank1 Name: | Previous Constituency |
| Blank1 Info: | Habiganj-4 (Constituency 242) |
| Blank2 Name: | Next Constituency |
| Blank2 Info: | Brahmanbaria-2 (Constituency 244) |
Brahmanbaria-1 is a constituency of the Jatiya Sangsad (National Parliament) of Bangladesh.Since 6 August 2024 the constituency is vacant.
The constituency encompasses Nasirnagar Upazila.
The constituency was created in 1984 from the Comilla-6 constituency when the former Comilla District was split into three districts: Brahmanbaria, Comilla, and Chandpur.
Ahead of the 2008 general election, the Election Commission redrew constituency boundaries to reflect population changes revealed by the 2001 Bangladesh census. The 2008 redistricting altered the boundaries of the constituency.
Ahead of the 2014 general election, the Election Commission reduced the boundaries of the constituency. Previously the constituency had included three union parishads of Brahmanbaria Sadar Upazila (after 2010, the new Bijoynagar Upazila): Budhanti, Chandura, and Harashpur.
Mohammad Sayedul Haque died in December 2017. Bodruddoza Md. Farhad Hossain of the Awami League was elected in a March 2018 by-election.