Julian Illingworth (born January 30, 1984) is a retired American professional squash player.

Illingworth first made an impression on the American junior circuit in 1998-1999 when he finished third in the country for boys under 16.

He also won 2 national individual titles during his junior and senior years at Yale.

He became the highest-ranked American male player of all-time after reaching no.

This biographical article relating to an American squash figure is a stub.