It has 52432 units of house hold and total area 265.32 km².

As of the1991 Bangladesh Census Pirgachha has a population of 256573. Males constitute are 50.59% of the population, and females 49.41%. This Upazila's eighteen up population is 125484. Pirgachha has an average literacy rate of 21.5% (7+ years), and the national average of 32.4% literate.

Pirgachha has 9 Unions/Wards, 171 Mauzas/Mahallas, and 189 villages.