William Lloyd Standish IV (February 16, 1930 – January 1, 2015) was a United States federal judge.

Standish was born in Pittsburgh, Pennsylvania in 1930. He received a B.A. from Yale University in 1953. He received an LL.B. from the University of Virginia School of Law in 1956. He was in private practice in Pittsburgh, Pennsylvania from 1956 to 1980. He was a judge on the Court of Common Pleas, Fifth Judicial District of Pennsylvania from 1980 to 1987.

Standish was a federal judge on the United States District Court for the Western District of Pennsylvania. Standish was nominated by President Ronald Reagan on July 1, 1987, to a seat vacated by Barron P. McCune. He was confirmed by the United States Senate on November 5, 1987, and received his commission on November 6, 1987. He assumed senior status on March 1, 2002 and stopped hearing cases in 2012.

Standish died on January 1, 2015, following a lengthy undisclosed illness. He was 84.