Peter W. Princi was an attorney who served as Collector of Customs for the Port of Boston and as a United States magistrate judge.
Princi was born on November 7, 1915, to Joseph M. and Teresa M. Princi, immigrants from Reggio Calabria, Italy. His father worked as a tailor on Newbury Street in Boston. Princi had three brothers, one of whom was actor Carl Princi.
Princi graduated from Northeastern University School of Law in 1938 and began practicing law in 1940. During World War II he was a first lieutenant in the Army Intelligence Corps in Italy, Sicily and North Africa. From 1949 to 1959 he was a member of the board of directors and secretary of the Lincoln Settlement House in Boston's South End.
Princi was an active member of the Democratic Party. He was a delegate to the state Democratic convention in 1954 and an alternate delegate to the 1956 and 1960 Democratic National Conventions. He was close to President John F. Kennedy.
Princi also served on a number of boards in his hometown of Winthrop, Massachusetts. He was a member of the Finance Committee, chairman of the board of selectmen, and Town Counsel. In 1960 he was president of the City Solicitors and Town Counsel Association of Massachusetts.
From 1961 to 1971, Princi was a senior partner of the Boston law firm of Princi and Lecomte. In 1964 he also served as assistant district attorney for Suffolk County.
On September 13, 1961, Princi was appointed Collector of Customs for the Port of Boston by President John F. Kennedy. He received his commission from President Kennedy on September 29 in a ceremony held at Hammersmith Farm, the home of Kennedy's mother-in-law. He was sworn into office the following day by Walter A. Van Dalla, chairman of the Winthrop Board of Selectmen, at Winthrop Town Hall.