|28th Speaker of the Legislative Assembly of Prince Edward Island|
November 12, 2003 – July 5, 2007
|Lieutenant Governor||Léonce Bernard|
|Preceded by||Mildred Dover|
|Succeeded by||Kathleen Casey|
|Member of the Legislative Assembly of Prince Edward Island for|
November 18, 1996 – May 28, 2007
|Preceded by||Riding Established|
|Succeeded by||Janice Sherry|
|Born||October 15, 1939|
|Political party||Progressive Conservative|
|Residence||Summerside, Prince Edward Island|
Gregory "Greg" J. Deighan (born 15 October 1939) was the Speaker of the Legislative Assembly of Prince Edward Island, Canada. He was a member of the Progressive Conservative Party, representing the Wilmot-Summerside electoral district.
In May 2000, Deighan was appointed to the Executive Council of Prince Edward Island as Minister of Tourism. In August 2002, Deighan was moved to Minister of Fisheries and Aquaculture. He served as Speaker of the Legislative Assembly from 2003 to 2007.
- "Minding the House: a biorgraphical guide to Prince Edward Island MLAs (Volume 2), 1993-2017 (Cassandra Bernard & Sean McQuaid, Eds.)" (PDF). Legislative Assembly of Prince Edward Island. Retrieved 2021-04-04.
- "Four new faces in Binns cabinet". CBC News. May 1, 2000. Retrieved 2016-06-03.
- "Changes to Ministry". Government of Prince Edward Island. August 22, 2002. Retrieved 2016-06-03.
- "Chronological List of Past Speakers of the Legislative Assembly: 1773-Present" (PDF). Legislative Assembly of Prince Edward Island. Retrieved 2016-06-03.
- "Mildred Dover leaving politics to make way for rising star". The Guardian. April 7, 2007. Retrieved 2016-06-03.