Roger Henry Brough Whittaker (22 March 1936 – 13 September 2023) was a Kenyan-born British singer-songwriter and musician. His music is an eclectic mixture of folk music and popular songs, the latter variously in a crooning or in a schlager style. He is best known for his baritone singing voice and trademark whistling ability as well as his guitar skills.

The Times observed that "[s]ome pop singers define the zeitgeist and many more follow it. A much rarer number of them defy it and Roger Whittaker counted himself proudly and unapologetically among them". Despite not obtaining sustained chart success, he gained a large international following through TV appearances and live performances, with fan clubs in at least 12 countries (including Australia, Canada, Great Britain, New Zealand, South Africa, and the United States). One admirer was US president George H. W. Bush, at whose home he was invited to perform.

Whittaker is best known internationally for his 1971 single "The Last Farewell", which charted in 11 countries. In the United States, where the song was released four years later, it became his only entry in the Billboard Hot 100, and reached number one on the Adult Contemporary chart. Whittaker was widely known for his own compositions, including "Durham Town (The Leavin')" (1969) and "I Don't Believe in If Anymore" (1970). American audiences are most familiar with his 1970 hit album New World in the Morning and his renditions of "Ding! Dong! Merrily on High" and "The Twelve Days of Christmas". From the 1970s onward he had great success and a devoted fan base in Germany singing in German. His 1977 Greatest Hits album All My Best was marketed on television through mail order and went on to sell nearly one million copies. In total, he sold an estimated 50–60 million records during his career.