(দিরাই) is an Upazila
of Sunamganj District
in the Division of Sylhet
Derai is located at . It has 30041 units of house hold and total area 420.93 km².
As of 1991
, Derai has a population of 185284. Males constitute are 51.38% of the population, and females 48.62%. This Upazila's eighteen up population is 91693. Derai has an average literacy rate of 25.3% (7+ years), and the national average of 32.4% literate. Religion: Muslim 68.53%, Hindu 30.96%, Buddhist 0.11%, Christian 0.12%.
Derai has 9 Unions/Wards, 170 Mauzas/Mahallas, and 233 villages.