William Paul Constantino Sr. (August 19, 1911 – July 29, 1989) was an American state legislator who was a justice of Clinton District Court and a member of the Massachusetts House of Representatives.

[3] His grandson, Mike Bonin, was elected to the Los Angeles City Council in 2014.

In 1938 he was an unsuccessful candidate for Republican nomination for the United States House of Representatives seat in Massachusetts's 3rd congressional district.

[2] Constantino was a member of the United States Army during World War II.

He was survived by his wife and four children, one of whom, William Constantino Jr., also served as a state representative.