This, the headquarters of the pargana, is suitated in Lat. 280 41' North and Long. 770 32' East, to the east of the Hapur road at a distance 10 kms from Ghziabad and 24 kms west of Hapur. The place gives its name to a railway station on the Ghaziabad-Moradabad branch line of the Northen Railway, the railway station actually lying within the limits of the adjoining village of Masuri.
Dasna owes its origin to Salarsi, a Rajput raja of Mahmud Ghajnavi's days. It is said that the raja had gone to bathe in the Ganga in order to get rid of his leprosy and, liking the place, settled down in it and also built a large fort there. While diging the foundation of the fort, a man is stated to have been fatally bitten by a snake, an incident which is said to have given the place its name, "DASNA", meaning to bite (used onluy for the bite of a snake). The village was ravaged by Ahmad Shah Abdali in 1760 when he pulled down the fort.