The following is a list of notable alumni, faculty and affiliates of University of Guelph in Canada.
At its first convocation on May 21, 1965 George Drew was installed as chancellor of the University.[1]
- Edmund Abaka - professor of African history at the University of Miami
- Allan Armitage – author and professor at the University of Georgia[6]
- Rupan Bal – Canadian–Indian YouTuber[7]
- Chris Banks – poet[8]
- Toby Barrett – politician, Member of Provincial Parliament for Haldimand—Norfolk[9]
- Alexandra Beaton – actress and dancer[10]
- Karen Beauchemin – research scientist[11]
- Deni Ellis Béchard – Canadian-American novelist[12]
- Jennifer Beech – Canadian television host
- Laura Bertram – actress[13]
- Mark Bourrie – lawyer and journalist
- Tim Bray – software developer and entrepreneur
- Sara Angelucci – artist and professor at Ryerson University[14]
- Harry Brightwell
- Ryder Britton
- Christa Brosseau
- James Robert Brown
- Krista Buecking
- Tyler Clark Burke – artist, illustrator, designer, and writer
- Kathy Butler
- Mikey Bustos
- Cassie Campbell
- Dom Cardillo
- David Castle
- Anna Chatterton
- Laurel Schafer, Canada Research Chair in Catalyst Development
- Dicki Chhoyang
- George Chiang
- Meredith Chivers
- Olivia Chow – 66th Mayor of Toronto
- Reid Coolsaet
- Claude Cormier
- Anne Croy, Reproductive immunologist
- Elisabeth de Mariaffi
- Diane Deans
- Susan Dobson
- Peter Donaldson
- Maura Doyle, multimedia artist
- Rick Ferraro
- Graham Forsythe
- James E. Fraser
- Harry L. Garrigus
- Keegan Gaunt
- Nora Gould – poet
- Tim Grant
- Peter S. Gray
- Michael Grimes (Associate Diploma 1920), Irish scientist and first Professor of Microbiology at University College Cork
- Tara Hedican
- Graham Henderson
- Stephen Hicks
- Robert Horner
- Nasrin Husseini – (MSc 2020) Afghani refugee advocate, veterinary researcher, and food activist[15]
- Alexis Jordan
- David Joseph
- Mark Lautens
- Robert Leigh
- Matt Lennox
- Karen Ludwig
- Judy Maddren
- Charlie Masters
- Brandon Maxwell
- Tom McBroom
- Scott McGillivray
- Audrey McLaughlin
- Heather McNairn
- Gord Miller
- K. D. Miller
- Kenneth Mitchell
- Kimberly Moffit
- Peter Moss
- Jacey Murphy
- Ian Murray
- Brendan Myers
- Opendra Narayan
- Piers Nash
- Joe Neilands
- Greg O’Gallagher
- Penny Park
- Roula Partheniou – artist
- Cecil Frederick Patterson
- Mirela Rahneva
- Lisa Raitt
- Jordan Raycroft
- Jus Reign – Canadian Comedian and YouTube Personality
- Sue Richards
- Jael Richardson
- Doug Rollins
- Liz Sandals
- Dolph Schluter
- James Schroder
- H. B. Sharman
- Jonathan Sherbino
- Kalidas Shetty
- Vandana Shiva
- Jane Siberry – singer / songwriter
- Evan Siddall - business leader
- Michael Sona – political figure
- Ralph Spence
- John Steffler
- Bernadine Strik (1962–2023), horticulturist.[16]
- Derek Sullivan
- Mary Swan
- Marwan Tabbara
- Stephen J. Tanner
- Chase Tang - actor / mental health advocate
- Lisa Thompson
- Jane Urquhart
- Dennis vanEngelsdorp – assistant professor at University of Maryland
- Mike Wallace – politician
- Hope Weiler – associate professor at McGill University
- Terry Wilson – police officer
- John Wise – politician
- Jane Wright – entomologist
- Elizabeth Yake – film producer
- Jiyuan Yu – philosopher
- Liz Howard – poet and winner of the 2016 Griffin Poetry Prize for her book Infinite Citizen of the Shaking Tent
- Aisha Sasha John – poet
- Canisia Lubrin – poet
- Elisabeth de Mariaffi – novelist and short story writer
- Soraya Peerbaye – poet
- Ayelet Tsabari – novelist and winner of the Sami Rohr Prize
- Paul Vermeersch – poet
- Zoe Whittall – novelist and Canadian Screen Award-winning screenwriter
- Alissa York – novelist[17]
- Edgar Archibald – agricultural scientist
- George Atkins – broadcaster[18]
- Karen Bailey – scientist[19]
- Roberta Bondar – Canada's first female astronaut
- Ernest Charles Drury – eighth Premier of Ontario
- John Kenneth Galbraith – economist
- Bill Hanley – Hockey Hall of Fame member
- George Stewart Henry – tenth Premier of Ontario
- Grant MacEwan – ninth Lieutenant Governor of Alberta
- H.R. MacMillan – forester, industrialist, wartime administrator, and philanthropist[20]
- Harry Nixon – thirteenth Premier of Ontario
- Stanley Thompson – golf course architect
- Kelly Thornton – theatre director[21]
- Lyle Vanclief – former Minister of Agriculture
- Emma-Jayne Wilson – jockey
- Charles Ambrose Zavitz – pioneered the development of soybeans for commercial use in Ontario
- Edmund Zavitz – pioneer in re-forestation in Ontario
- Donald Arthur Hatch — Canadian academic
- Cara Elizabeth Yar Khan – disability advocate, public speaker and United Nations humanitarian
- Azadeh Elmizadeh - visual artist]
- John Dunsworth - Actor & The Liqour