Guelph in Wellington County, Ontario — Central Canada (North America)
John Douglas MacLachlan 1906-1987
President, Ontario Agricultural College, 1950-1962
President, Federated Colleges, 1962-1964
President, University of Guelph, 1964-1967
John Douglas MacLachlan was born in 1906 on a dairy farm near Burritt's Rapids, Ontario. After completing his BA in chemistry and biology at Queen's University, he attended Harvard University, receiving an MA in 1933 and a PhD in plant pathology in 1935. He returned to Canada in 1939 to take up the position of assistant professor of botany at the Ontario Agricultural College. An inspiring teacher and a brilliant researcher, MacLachlan rose quickly through the ranks to head the Department of Botany in 1948. In 1950, he was named president of the Ontario Agricultural College.
During MacLachlan's tenure, there was an increased emphasis on rural society, a deepened commitment to science, research and intellectual growth, and growing internationalism. He proposed integration of the Ontario Agricultural College, the Ontario Veterinary College and McDonald Institute. The Federated Colleges, with MacLachlan as president, were created in 1962, with a dean for each college and a Board of Regents to oversee the federation.
For many years, the government had resisted the pursuit of university status for the Ontario Agricultural College. Finally, in 1964, the government introduced the bill to create the University of Guelph and named MacLachlan its first president. In 1966, the University of Toronto conferred a Doctor of Laws degree on MacLachlan in recognition of his role in directing the founding colleges to university status with wisdom and tact.
The contributions MacLachlan made both as an academic and president were numerous. At his installation as the first president of the University of Guelph, he spoke of the need to balance the traditional role of the founding colleges with the need to be at the forefront of change, MacLachlan's skill and vision in finding this balance assured a strong beginning for the Unversity or Guelph.
MacLachlan Building 1902
Generously conated by. Dr. Bonnie MacLachlan and Dr. Richard MacLachlan in loving memory of their father
Erected by University of Guelph.
Topics. This historical marker is listed in these topic lists: Agriculture • Education • Science & Medicine. A significant historical year for this entry is 1906.
Location. 43° 31.88′ N, 80° 13.722′ W. Marker is in Guelph, Ontario, in Wellington County. It is on Gordon Street. The marker is on the University of Guelph campus on Johnston Green, accessible by foot on Alumni Walk, approx. 150 metres from Gordon Street. Touch for map. Marker is at or near this postal address: 476 Gordon Street, Guelph ON N1G 1Y4, Canada. Touch for directions.
Regionally, this marker is in the Huron-Perth-Waterloo-Wellington Area and in Southwestern Ontario. It is also in Central Canada. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds
itself in what was once a British colony, the Viceroyalty of New France, the Haudenosaunee (Iroquois) Confederacy, and Ruperts Land.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Massey Hall (within shouting distance of this marker); a different marker also named Massey Hall (within shouting distance of this marker); Joseph Benson Reynolds 1867-1948 (within shouting distance of this marker); Winegard Walk (about 120 meters away, measured in a direct line); MacKinnon Building (about 120 meters away); William Henry Day 1870-1938 (about 150 meters away); MacNaughton Building (about 150 meters away); Charles A. Zavitz 1863-1942 (about 150 meters away). Touch for a list and map of all markers in Guelph.
Credits. This page was last revised on September 7, 2025. It was originally submitted on September 3, 2025, by Tim Boyd of Hamilton, Ontario. This page has been viewed 68 times since then and 11 times this year. Photos: 1, 2, 3. submitted on September 3, 2025, by Tim Boyd of Hamilton, Ontario. • Andrew Ruppenstein was the editor who published this page.


