Waterloo, Ontario is a city in Southern Ontario, Canada. It is very close to the city of Kitchener, Ontario. Kitchener and Waterloo are often referred to together as "Kitchener-Waterloo", or "KW". They are sometimes called "the Tri-City" (to include the City of Cambridge). All three have separate city governments.
The University of Waterloo and Wilfrid Laurier University are in Waterloo. The headquarters of mobile phone maker BlackBerry is there.

Waterloo has a population of 121,436 (as of 2021). University of Waterloo is marked the 4th best university in Canada. (Wilfrid Laurier University is 27th)