Bulandshahr District also spelt Bulandshahar, is a district of Uttar Pradesh state in northern India. Bulandshahr city is the district headquarters. Its is part of National Capital Region of India.

According to the 2011 census Bulandshahr district has a population of 3,498,507, roughly equal to the nation of Lithuania or the US state of Connecticut.This gives it a ranking of 85th in India (out of a total of 640).The district has a population density of 788 inhabitants per square kilometre (2,040/sq mi).Its population growth rate over the decade 2001-2011 was 20.09%.Bulandshahar has a sex ratio of 892 females for every 1000 males, and a literacy rate of 76.23%.In 1901, the population was 1,138,101.