Waterloo is a city in Ontario, Canada. The City of Waterloo is a dynamic, leading edge community that is committed to the future.  Also referred to as the Top Intelligent Community of all cities in Ontario.

The reported population for the city can vary depending on how temporary residents at Waterloo's two universities are counted. At the time of the 2006 census, Waterloo had a population of 97,475. That number does not include post-secondary students who are temporary residents. The city's total population at the end of 2006—with over 20,000 non-resident post-secondary students included—was 114,700.

Waterloo has a service-oriented economy with healthy insurance and high-tech sectors as well as two major universities.  The city's largest employers are Sun Life Financial/Clarica, the University of Waterloo, Manulife Financial and Research In Motion.

The city is part of Canada's Technology Triangle (CTT), a joint economic development initiative of Waterloo, Kitchener, Cambridge and the Region of Waterloo that markets the region internationally. Despite its name, CTT does not focus exclusively on promoting technology industries, but on all aspects of economic development.

Waterloo has a strong technology sector with hundreds of high-tech firms. The dominant technology company in the city is Research In Motion, makers of the BlackBerry, which has its headquarters in the city and owns several office buildings near the University of Waterloo's main campus.

Notable Waterloo-based high-tech companies include: Dalsa, Descartes Systems Group, Maplesoft, MKS Inc., Open Text Corporation, Research In Motion (RIM), and Sandvine.

Many other high-tech companies, with headquarters elsewhere, take advantage of the concentration of high-tech employees in the Waterloo area, and have research and development centres here. Sybase, Google, Oracle, Adobe, McAfee, NCR Corporation and Agfa are among the large, international technology companies with development offices in Waterloo.