William Diamond

Bill Diamond
Member of the Maine Senate
In office
December 3, 2014 – December 7, 2022
Preceded byGary Plummer
Succeeded byTim Nangle
Constituency26th district
In office
December 1, 2004 – December 5, 2012
Succeeded byGary Plummer
Constituency12th district
In office
December 1, 1982 – December 3, 1986
Preceded byDavid G. Huber
Succeeded byRobert G. Dillenback
Constituency
45th Secretary of State of Maine
In office
1989–1996
GovernorJohn R. McKernan Jr.
Angus King
Preceded byRodney S. Quinn
Succeeded byDan Gwadosky
Member of the Maine House of Representatives
from the 23rd district
In office
January 5, 1977 – December 1, 1982
Preceded byThomas J. Peterson
Succeeded byGary C. Cooper
Personal details
Born(1945-02-19)February 19, 1945
DiedAugust 31, 2025(2025-08-31) (aged 80)
PartyDemocratic
SpouseJane Diamond
Alma materUniversity of Southern Maine, Gorham
University of New England

G. William Diamond (February 19, 1945 – August 31, 2025) was an American Democratic politician, educator, small business owner, legislator and onetime Maine Secretary of State. He served in the Maine Senate representing Senate District 26, which comprises the towns of Windham, Raymond, Standish, Casco, Baldwin, and Frye Island.

Diamond served in the Maine House of Representatives from 1977 to 1982, was the Maine Secretary of State from 1989 to 1997, and served in the Maine Senate from 1982 to 1986, from 2004 to 2012, and from 2014 to 2022. He was a teacher in the Windham and Raymond school systems for 18 years and was the superintendent and director of governmental relations for the controversial Élan School in Poland, Maine.