Paul Allen Simmons (born August 31, 1921) is a United States federal judge.
Born in Monongahela, Pennsylvania, Simmons received a B.A. from the University of Pittsburgh in 1946 and a J.D. from Harvard Law School in 1949. He was a Professor, South Carolina State College Law School, Orangeburg, South Carolina from 1949 to 1952. He was a Professor, North Carolina College Law School, Durham, North Carolina from 1952 to 1956. He was in private practice in Monongahela, Pennsylvania from 1956 to 1973. He was a judge on the Washington County Court of Common Pleas, Pennsylvania from 1973 to 1978.
Simmons was a federal judge on the United States District Court for the Western District of Pennsylvania. Simmons was nominated by President Jimmy Carter on January 26, 1978, to a seat vacated by Ralph F. Scalera. He was confirmed by the United States Senate on April 6, 1978, and received his commission on April 7, 1978. He assumed senior status on June 1, 1990.