Open Governments
Many governments and municipal organizations offer open data. This site of Government of Canada gives a hint about canadian administrations having an open data programm.
Many events regarding open data in Canada are also listed on this Web page. An interactive map can be used to see and select canadian open data providers.
Consult
http://open.canada.ca/en/maps/open-data-canada for more details.
You will also find a list of governments and organizations offering open data in Canada and United States below. Consult each section for more details on those organizations.