Paul Harold Macklin, PC, MP (born May 22, 1944 in Northumberland County, Ontario) is a Canadian politician. He was a member of the Canadian House of Commons, representing the riding of Northumberland—Quinte West of the Liberal Party caucus from 2000 to 2006.
Macklin has a Bachelor of Arts degree from the University of Western Ontario, and a law degree from the University of Windsor. After being called to the bar, Macklin worked for the Toronto firm of Davies, Ward & Beck.
He was first elected to Parliament in the federal election of 2000, winning a fairly easily victory over his Canadian Alliance and Progressive Conservative opponents in the riding of Northumberland. The CA and PC parties merged in late 2003, and Macklin faced a much more difficult challenge in that year's federal election, defeating Conservative Doug Galt by only 313 votes.
Macklin served as Parliamentary Secretary to the Minister of Justice and Attorney General of Canada from February 2002 to December 2003, and was re-appointed to the position on July 20, 2004.