Jessica Jennifer Williams (March 17, 1948 – March 10, 2022 Baltimore, MD) was an American jazz pianist and composer.

Williams was born in Baltimore, Maryland, on March 17, 1948. She started playing the piano at age four, began music lessons with a private teacher at five, and at age seven was enrolled into the Peabody Preparatory. She studied classical music and ear training with Richard Aitken and George Bellows at the Peabody Conservatory of Music.

At age twelve, Williams was listening to Dave Brubeck, Miles Davis, and Charles Mingus. She began performing jazz in her teens, playing with Richie Cole, Buck Hill, and Mickey Fields. In a radio interview with Marian McPartland on NPR‘s Piano Jazz from 1992, she stated that her main influences were not pianists, but Miles Davis and John Coltrane.