Margaret Marian McPartland, OBE (née Turner; 20 March 1918 – 20 August 2013), was an English-American jazz pianist, composer and writer. She was the host of Marian McPartland’s Piano Jazz on National Public Radio from 1978 to 2011.

After her marriage to trumpeter Jimmy McPartland in February 1945, she resided in the United States when not travelling throughout the world to perform. In 1969 she founded Halcyon Records, a recording company that produced albums for 10 years. In 2000 she was named a National Endowment for the Arts Jazz Master. In 2004 she was given a Grammy Award for lifetime achievement. In 2007 she was inducted into the National Radio Hall of Fame. Although known mostly for jazz, she composed other types of music as well, performing her own symphonic work A Portrait of Rachel Carson with the University of South Carolina Symphony Orchestra in 2007. In 2010 she was named a member of the Order of the British Empire.

Margaret Marian Turner was born on 20 March 1918 to Frank and Janet (née Payne) Turner. She had one younger sibling, a sister, Joyce. She demonstrated early aptitude at the piano, and would later realize that she had perfect pitch. Margaret (Maggie to her family) studied violin from the age of nine, but never took to the instrument. She also trained as a vocalist and received a number of favorable reviews in the local paper. Janet refused to find her daughter a piano teacher until the age of 16, by which time Margaret was already adept at learning songs by ear. This lack of early education meant that Marian was never a strong reader of notated music, and would always prefer to learn through listening.