William Paul Joseph McCrossan (born May 20, 1942) is a Canadian actuary and former Member of Parliament.
He was employed by Canada Life Assurance prior to being elected to the House of Commons.
He also supported the passage of the Non-smokers' Rights Act, which was introduced by a New Democratic Party member of parliament, Lynn McDonald.
He attempted to return to politics in the riding of Scarborough East in the 2000 federal election but was defeated.
[5] In 2010, McCrossan was named to the New Brunswick Task Force on Protecting Pensions.