Sangam (transl. Confluence) is a 1964 Indian musical romantic drama directed, produced and edited by Raj Kapoor at R. K. Studios, written by Inder Raj Anand, and distributed by R. K. Films with Mehboob Studio and Filmistan. It stars Raj Kapoor, Rajendra Kumar, Vyjayanthimala in lead roles, along with Iftekhar, Raj Mehra, Nana Palsikar, Lalita Pawar, Achala Sachdev, Hari Shivdasani in supporting roles. It tells the story of a pilot Sundar (Raj Kapoor), who upon returning home from war after being assumed dead, weds the woman Radha (Vyjayanthimala) he had long loved, unaware that she had been planning to marry his best friend Gopal (Rajendra Kumar).

Sangam was the first Indian film to be exclusively shot abroad on locations including London, Paris and Switzerland, and was also among the most expensive film of its time with the longest runtime for an Indian film up to that time. The film explores themes of love, loyalty, sacrifice, and the consequences of choices made in relationships. It portrays the conflicts and emotional turmoil faced by the characters as they navigate their complicated circumstances. The film was considered bold and much ahead of its time due to its storyline and characterizations. All these things immensely contributed to the commercial success of the film.

Sangam released on 26 June 1964 to widespread critical acclaim, with high praise for its novel concept, direction, screenplay, dialogue, soundtrack, costumes, cinematography and performances of the cast, and was widely considered as Hindi cinema's greatest love triangle. It emerged as a major blockbuster at the box-office, grossing ₹8 crore worldwide, ranking as the highest-grossing Hindi film of the year, and the second highest-grossing film of the decade behind Mughal-e-Azam (1960).

Sangam is widely regarded as R. K. Films’ magnum opus and the career-best performances of Raj Kapoor, Vyjayanthimala and Rajendra Kumar.

Internationally, the film was released in the Soviet Union in 1964. Director Dasari Narayana Rao remade the film in Telugu, Kannada and Tamil languages as Swapna (1981).