Delhi-6 is a 2009 Indian Hindi-language drama film directed by Rakesh Omprakash Mehra. The film stars Abhishek Bachchan as an NRI who arrives in India with his ailing grandmother (played by Waheeda Rehman) and begins discovering his roots before getting embroiled in a religious dispute involving a mysterious monkey-like attacker. The film co-stars Sonam Kapoor, Aditi Rao Hydari, Rishi Kapoor, Supriya Pathak, Atul Kulkarni, Pavan Malhotra, Deepak Dobriyal, Divya Dutta, Vijay Raaz and Om Puri. It marks the Hindi film debut of Rao Hydari. The number 6 refers to the Postal Index Number (PIN) of the Chandni Chowk area of Old Delhi, a shortened form of 110006. It is Mehra's third film after Aks (2001) and Rang De Basanti (2006). The film's soundtrack, composed by A. R. Rahman, was a commercial success and received positive reviews from music critics upon release.

Following international premieres at the Dubai International Film Festival as well as the Museum of Modern Art, Delhi-6 was released on 20 February 2009 and was a commercial failure at the box office. Despite failing commercially, it received mixed reviews from critics, with praise for its soundtrack and performances of the cast, but criticism for its story, screenplay and pacing.

At the 57th National Film Awards, Delhi-6 won Best Production Design (Samir Chanda) in addition to winning the Nargis Dutt Award for Best Feature Film on National Integration. The version submitted to the National Awards featured an alternate ending favored by Mehra, which was unavailable to the general public and shown only in a limited one-week theatrical release as well as the Venice Film Festival. Additionally, at the 55th Filmfare Awards, the film received 7 nominations, including Best Supporting Actress (Dutta), and won 3 awards, including Best Music Director (A. R. Rahman). The film has over the years become notable for its soundtrack.