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 situated on old NH-91, which connects Lal Kuan in Ghaziabad with Aligarh via Sikandrabad, Bulandshahr and Khurja.

The Dadri railway station is a complex station & yard spread over 6 km on busy route of Delhi–Kanpur section of Indian Railways with connectivity with NTPC Dadri and Container Depot at Tilpata Karanwas.

Noida, Dadri, Jewar, Khurja and Sikandrabad falls under the Gautam Buddha Nagar Lok Sabha constituency, represented by a MP.