Alan Jeffrey Giacomin (born April 1, 1959, in Kingston, Ontario, Canada) is a professor of chemical engineering at Queen's University in Kingston, Ontario, and cross-appointed in the Department of Mechanical & Materials Engineering, and of Physics, Engineering Physics, and Astronomy. He has been editor-in-chief of Physics of Fluids since 2016. He holds the Tier 1 Canada Research Chair in Rheology from the Canadian government's Natural Sciences and Engineering Research Council. Since 2017, Giacomin has been President of the Canadian Society of Rheology.