McKenney was born in Fort-Coulonge, Quebec, the child of a forester and stay-at-home parent. The family would then move to Sturgeon Falls, Ontario, where McKenney went to elementary school. In grade 9, McKenney moved to Pembroke, Ontario when their dad got a job at Algonquin College. McKenney had two children in their early 20s, working in fast food and as a photographer's assistant to support them. McKenney moved to Ottawa at the age of 26, where they completed a Bachelor of Social Science at the University of Ottawa in 1993. After graduating, McKenney lived in Kanata and had a job reading news articles on television for people who are blind.
