According to the 2011 Census of Bangladesh, Pirojpur Sadar Upazila had 38,017 households and a population of 163,470.

Pirojpur Sadar had a literacy rate (age 7 and over) of 70.30%, compared to the national average of 51.8%, and a sex ratio of 1026 females per 1000 males.

[5][6] As of the 1991 Bangladesh census, Pirojpur Sadar has a population of 225,156.

[8] Pirojpur Sadar Upazila is divided into Pirojpur Municipality and seven union parishads: Durgapur, Kadamtala, Kalakhali, Shankorpasha, Shariktola, Sikder Mallik, and Tona.

[9] Pirojpur Municipality is subdivided into 9 wards and 30 mahallas.