James Oscar Smith (December 8, 1928 – February 8, 2005) was an American jazz musician whose albums often appeared on Billboard magazine charts. He helped popularize the Hammond B-3 organ, creating a link between jazz and 1960s soul music.

In 2005, Smith was awarded the NEA Jazz Masters Award from the National Endowment for the Arts, the highest honor that America bestows upon jazz musicians.

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