Hapur ( pargana and tahsil Hapur) is the headquarter of the tahsil, this is the largest tahsil of the district and lies in Lat. 280 44' North and Long. 770 47' East, 34 kms east of Ghaziabad. Hapur is a railway junction where the Delhi-Moradabad and the Meerut-Khurja lines of the Northern Railway meet.
It is said that the place was founded about 983 A.D. by Haradatta, the Dor chieftain of Bulandshahr and Meerut, and was named haripur after him. Another derivation is from the word 'hapar' ,which signifies an orchard. A system of grants for the disabled and retired personnels of the army was introduced here by Perron(a French Military commander) and was adopted by the British for many years under which wastelands were cleared of jungles and were assigned to invalid pensioners. Ibrahim Ali, the tahsildar of Hapur, defended the town against Amir Khan Pindari and his 500 men in 1805. The forces of Walidad Khanof Malagarh planned an attack on the town during the struggle for freedom in 1857 but in was foiled by the Jats of Bhatona.