A Selection of Church Records in Ontario, then known as Upper Canada for:

1764-1781 marriages
1761-1786 baptisms
1782-1786 marriages
1768-1786 deaths
1798-1830 baptisms marriages
1793-1832 baptisms
1796-1833 marriages
1796- 1816 confirmations and communicants
1816-1827 Baptisms and marriages
1830-1838 BMD
1811-1841 marriages
1812-1814 baptisms
1827-1834 marriages
1820-1836 baptisms marriages and burials
1821-1827 military baptisms

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Registers are from these places, please note a great many of the folks give place of residence as other than these areas. I would assume due to lack of ministers, also the issue of the Gov. of the time not recognizing certain religions until much later.
Assumption Sandwich
St Thomas
Fredricksburg Lennox
Gore & London
Ancaster
Elizabethtown
Niagara
Stamford
Chippewa
Fort George