Vital Statistics for births, marriages and deaths in Ontario are avaible from 1869 on. There are some earlier years but there are many gaps.
Births are avialable to the public from 1869-1912
Marriages are available from 1869-1927
Deaths are available from 1869-1937
All of these Vital Stats records are publicly available on microfilm. Another year of Births, Marriages and Deaths is sent annually to the Archives of Ontario. These are restricted until they have been made available on microfilm. The latest transfer (1913 births, 1928 marriages, 1938 deaths) is being filmed and will be available some time in 2010.
See
Interloan Vital Statistics
You can also search the indexed Vital Stats for Ontario on
Ancestry.com and view the actual images online. Biiths to 1909, Marriages to 1924 and Deaths to 1934 are available on Ancestry.
You can also search the index to Ontario Deaths 1869-1947 at
Family Search Pilot site There are no images attached to the index on FamilySearch
For registrations after the publicly available years, you must order a search from the Office of the
Registrar General