Brahmanbaria Sadar is an Upazila of Brahmanbaria District in the Division of Chittagong, Bangladesh. Brahmanbaria Thana was converted into an upazila in 1984. Brahmanbaria Sadar is located at.DemographicsAccording to the 1991 Bangladesh census, Brahmanbaria Sadar had a population of 659,449. Males constituted 51.38% of the population, and females 48.62%. The population aged 18 or over was 312,696. Brahmanbaria Sadar had an average literacy rate of 30.1% (7+ years), against the national average of 32.4%.