The Honourable Mark Gerretsen PC MP
Gerretsen as Mayor of Kingston, 2014.
Chief Government Whip
Incumbent
Assumed office May 14, 2025
Prime Minister	Mark Carney
Preceded by	Rechie Valdez
Deputy Leader of the Government in the House of Commons
In office September 16, 2023 – May 14, 2025
Prime Minister	Justin Trudeau Mark Carney
Preceded by	Sherry Romanado
Succeeded by	Arielle Kayabaga
Member of Parliament forKingston and the Islands
Incumbent
Assumed office October 19, 2015
Preceded by	Ted Hsu
Mayor ofKingston,Ontario
In office December 1, 2010 – December 1, 2014
Preceded by	Harvey Rosen
Succeeded by	Bryan Paterson
Personal details
Born	John Mark Gerretsen (1975-06-05)June 5, 1975 (age 50)[1] Kingston,Ontario, Canada
Political party	Liberal
Spouse	Vanessa Gerretsen
Children	3
Parent	John Gerretsen (father)
Residence(s)	Kingston,Ontario
Alma mater	Queen's University St. Lawrence College

Mark GerretsenMP (born June 5, 1975) is aCanadianpolitician who is theMember of Parliament forKingston and the Islands as a member of the Liberal Party of Canada. He was first elected in the 2015 federal election, and re-elected in 2019, 2021 and 2025.^[2] He currently serves as a Chief Government Whip.^[3]

Previously, he has served as Deputy Leader of the government in the House of Commons and well as the Parliamentary Secretary to the Leader of the Government in the House of Commons (Senate).

Gerretsen was born in Kingston, Ontario, the son of Assunta (Garofalo) andJohn Gerretsen.^[4] His father was mayor of Kingston and aMPP for Kingston and the Islands, and held several positions in the cabinets of PremierDalton McGuinty andKathleen Wynne. His father was born in Hilversum, Netherlands, and his mother emigrated fromSan Bartolomeo in Galdo (Benevento) Italy to Kingston in 1956.^[5] Gerretsen holds a bachelor's degree in economics fromQueen's University and studied computers atSt. Lawrence College. Gerretsen was first elected toKingston City Council in 2006, where he represented the Portsmouth District. After completing his four-year term as City Councillor, Gerretsen served as Mayor of Kingston from 2010 to 2014.

As Mayor, Gerretsen worked alongside the City of Kingston and municipal leaders across Ontario, advancing issues such as payments in lieu of taxes, the integration of social services, and increased investment in local infrastructure and affordable housing. Gerretsen also oversaw the creation of the Mayor's Task Force on Development to improve customer service for residents, and the development of an Age-Friendly Plan focused on making Kingston more senior-friendly.

In 2012, Gerretsen was elected to represent the City of Kingston on theAssociation of Municipalities of Ontario (AMO) Board of Directors. As a member of the Large Urban Mayor's Caucus of Ontario (LUMCO), Gerretsen worked with municipal leaders across Ontario advocating for increased investments in local infrastructure and affordable housing.

Gerretsen gained some notoriety in 2013 when he voiced his displeasure regarding the street partying that occurs during Queen's University's Homecoming. The event had taken a five-year hiatus due to rowdy behaviour and significant costs to the municipality for policing and clean up, and Gerretsen had reservations about the event's return. Gerretsen visited Aberdeen Street that weekend to assess the situation. He tweeted directly to Queen's Principal Daniel Woolf: “I am standing at William and Aberdeen. I have two words for you: NOT GOOD”. The “NOT GOOD” phrase was, in turn, used by Queen's University students and publicized in a number of memes at the Mayor's expense.^[6]

Gerretsen was first elected as a Member of Parliament in the2015 federal election, replacing first-term Liberal MPTed Hsu, who chose not to seek re-election. Gerretsen defeated Conservative candidate Andy Brooke by over 21,000 votes and earned 55.37% of the ballots cast.

In his first term in federal office, Gerretsen served on the Standing Committee for National Defence, and was elected as Chair of the Ontario Liberal Caucus. Gerretsen was also a member of the Standing Committee on the Environment and Sustainable Development for two and a half years.

Throughout 2015–2019, Gerretsen was able to obtain federal funding for many initiatives in Kingston and the Islands. Some of these investments included $1 million for Breakwater Park and Gord Downie Pier,^[7] $42 million for public transit, $31 million for new ferry vessels and $60 million for the Third Crossing.^[8]

Gerretsen's Private Members Bill, Bill C-243, The National Maternity Assistance Program Strategy, aimed to introduce amendments to the Employment Insurance Act to create a national maternity assistance program for women who are unable to work during their pregnancy and was based on the first-hand experience of a constituent in his riding.^[9] Gerretsen's Private Members Bill was introduced to the House of Commons on February 26, 2016. After passing second and third reading in Parliament, on October 26 and June 14, 2017, respectively, Gerretsen's Private Members Bill was brought to the Senate for first reading on June 14, 2017. When Parliament dissolved in the summer of 2019, Bill C-243 was at the Senate for third reading.^[10]

Gerretsen supports many Liberal policies, but sometimes voices his concerns with the direction the government takes on various files. As a strong environmental proponent, Gerretsen openly spoke against the Government's decision to expand the Kinder Morgan pipeline. In June 2018, Mark was one of three Liberal MPs who voted in favour of a motion proposed by the New Democratic Party to stop the project.^[11]

In 2019, 2021, and 2025 Gerretsen was re-elected as Member of Parliament.^[12] Currently, Gerretsen is Chief Government Whip. Previously, he has served as Deputy Leader of the government in the House of Commons and well as the Parliamentary Secretary to the Leader of the Government in the House of Commons (Senate).

On September 19, 2024, Gerretsen issued a public retraction for spreading disinformation about commentator Kat Kanada and announced that he was making a personal donation to a charity chosen by her.^[13]

Gerretsen and his wife Vanessa live in Kingston's east end with their three children Mason, Francesco and Vivian.

While Mayor of Kingston, Gerretsen oversaw the launch of Sustainable Kingston, an organization launched by the city as a non-profit to support Kingston in achieving the vision of becoming Canada's most sustainable city. Gerretsen was also Mayor of Kingston when the City converted all street lights to LED.^[14]

Personally, Gerretsen was an early participant in the province of Ontario's Microfit program aimed at encouraging homeowners to install solar panels to feed electricity back into the grid. Gerretsen and his wife, Vanessa, have been driving electric vehicles since 2012.

• Mark Gerretsen
• Mark Gerretsen – Parliament of Canada biography

• Mayors of Kingston, Ontario
• 1975 births
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• Queen's University at Kingston alumni
• Liberal Party of Canada MPs
• Members of the House of Commons of Canada from Ontario
• Canadian people of Dutch descent
• 21st-century mayors of places in Ontario
• 21st-century members of the House of Commons of Canada

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