Only Son or The Only Son may refer to:
A male who is the only child or son of a father The Only Son (novel), a 1966 novel by Nigerian novelist John Munonye The Only Son (1914 film), directed by Oscar Apfel The Only Son (1936 film), directed by Yasujiro Ozu The Only Son (2016 film), a Ugandan film Only Son (musician), former member of The Moldy Peaches and now a solo artist "Only Son", song by Liz Phair from the album whitechocolatespaceegg