Dadri is a town and a municipal board in Gautam Buddha Nagar District in the state of Uttar Pradesh, India. Noida, Dadri and Jewar are the 3 sub-divisions of GB Nagar district, each headed by a SDM. Dadri is located at 28°33′00″N 77°33′11″E / 28.550°N 77.553°E. It has an average elevation of 216 metres.