Gautam Buddha Nagar Lok Sabha constituency () is one of the 80 Lok Sabha (parliamentary) constituencies in Uttar Pradesh state in northern India. This constituency, spread over Bulandshahr and Gautam Buddha Nagar districts came into existence in 2008 as a part of the implementation of delimitation of parliamentary constituencies based on the recommendations of the Delimitation Commission of India constituted in 2002.
Presently, Gautam Buddh Nagar (G. B. Nagar) Lok Sabha constituency comprises five Vidhan Sabha (legislative assembly) segments. Noida, Jewar & Dadri fall under G. B. Nagar district, whereas Sikandrabad and Khurja fall under Bulandshahr district.