William Joseph Justice, (born May 8, 1942) is an American prelate of the Roman Catholic Church.

[1] In 1979, Justice became director of the Office of the Permanent Diaconate along with parochial vicar of Saint Timothy Church in San Francisco.

[1] In 1981, while still working at Saint Timothy, Justice was named as secretary of the Office of Pastoral Ministry.

He was consecrated by Archbishop George Niederauer on May 28, 2008, at the Cathedral of Saint Mary of the Assumption in San Francisco.

[citation needed] On November 16, 2017, Pope Francis accepted Justice's letter of resignation as auxiliary bishop of San Francisco; he had reached the mandatory retirement age of 75.