P. Bharathiraja (Tamil: பி. பாரதிராஜா; born 17 July 1941) is a South Indian filmmaker who works mainly in the Tamil film industry. Bharathiraja displayed a story-teller's potential from an early age. He is known for his realistic and sensitive portrayal of village-life in his movies.

He is well known for his work in 16 Vayathinile, Muthal Mariyathai, Vedham Pudhithu, Karuththamma, Kizhakku Cheemayile and Anthimanthaarai. He has won six National Film Awards, two Tamil Nadu State Film Awards and is also a recipient of other awards such as Filmfare Awards South, Cinema Express Awards and Nandi Awards.

Bharathiraja started his film career as an assistant to director P. Pullaiya and Kannada film-maker Puttanna Kanagal. He also worked with Krishnan Nair, Avinasi Mani and A. Jaganathan, he learned the grammar of film-making and got his first directorial opportunity in 1977. His first film 16 Vayathinile for which he wrote the script broke the then existing convention to create a new genre of village cinema. The movie is now regarded as a game-changer and a mile-stone in the modern history of Tamil Cinema. About the movie, said Bharathirajaa in his own words, "This movie was meant to be black and white art film produced with the help of National Film Development Corporation", but turned out to be a commercially successful color film and a starting point for several important careers.