Federation of Canadian Municipalities
http://www.fcm.ca/

The FCM has been the national voice of municipal government since 1901.  FCM is dedicated to improving the quality of life in all communities by promoting strong, effective and accountable municipal government.

Ontario Ministry of Municipal Affairs and Housing
http://www.mah.gov.on.ca/scripts/index.asp

The MMAH web site is a resource for planning legislation and tools in Ontario.