William Q. MacLean Jr.

William Q. MacLean Jr.
Official portrait, 1967
Member of the Massachusetts Senate
In office
1981–1993
Preceded byRobert M. Hunt
Succeeded byMark Montigny
Member of the Massachusetts House of Representatives
In office
1961–1981
Preceded byMaunel Faria
Succeeded byWalter Silveira Jr.
Personal details
BornWilliam Quincy Maclean Jr.
(1934-11-04)November 4, 1934
DiedFebruary 20, 2026(2026-02-20) (aged 91)
PartyDemocratic
Spouse(s)
Martha George
(m. 1956; div. 1976)

Marjorie McCarthy
(m. 1977; died 1995)

Mary Jane Moran O'Donnell
(m. 1998)
Children3
Alma materUniversity of Massachusetts
OccupationInsurance agent
Politician
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William Quincy MacLean Jr. (November 4, 1934 – February 20, 2026) was an American politician who served in the Massachusetts General Court from 1961 to 1993, serving in the Massachusetts House of Representatives from 1961 to 1981 and in the Massachusetts Senate from 1981 to 1993. A member of the Democratic Party, he was a part of House leadership from 1972 to 1978, serving as majority whip and then majority leader until he resigned from leadership amid a conflict with Speaker Thomas W. McGee. He gained the nickname "Mr. December" for his ability to get bills passed in the final month of a legislative session. He did not seek reelection in 1992 and was convicted of violating a conflict-of-interest law in 1993, paying the largest conflict-of-interest fine in state history and losing his pension.