|— Upazila —|
[[Image:|250px|Brahmanbaria Sadar is located in ]]
|- Total|| dunams (495.85 km2 /
Expression error: Syntax error in line: 1 - Operator: * is no prefix operator. *0.000386102 round 1 ^sq mi)
|- Urban density|
|- Rural density|
|- Metro density|
|Time zone||BST (UTC+6)|
|Website||Official Map of Brahmanbaria Sadar|
Brahmanbaria Sadar is located at . It has 109,067 households and total area .
As of the 1991 Bangladesh census, Brahmanbaria Sadar has a population of 659449. Males constitute are 51.38% of the population, and females 48.62%. This Upazila's eighteen up population is 312696. Brahmanbaria Sadar has an average literacy rate of 30.1% (7+ years), and the national average of 32.4% literate.
Brahmanbaria Sadar has 31 Unions/Wards, 379 Mauzas/Mahallas, and 398 villages.