Ontario Databases
The following databases are available at ancestry.com, on a for-a-fee basis.  I am willing to check them since I have a subscription to the site.
Please keep in mind these are for the whole of Ontario (or Canada) and not specific to Prescott County

Database Name                                                                                          Number of References
Ontario, Canada: Civil Marriage Registrations, 1869-73                              77,472
Ontario, Canada: Roman Catholic Marriages, 1827-1870                             6,175
War of 1812: Miscellaneous Canadian Records                                              772
Loyalists in the American Revolution: Miscellaneous Records                  458
Rebellion of 1837, Upper Canada                                                                         76
History of the Settlement of Upper Canada                                                    2,925
United Empire Loyalists, Parts I-II                                                                     22,456
Ontario, Canada Land Gazetteer, 1875-81                                                      17,293
Canadian Immigrant Records, Part One                                                       271,918
Canadian Immigrant Records, Part Two                                                         24,811

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Vital Records | LookUps | Queries & Searches | Cemetery Records | Census Information | Prescott Families | Website & Research Links | Prescott County Facts
Local History - Books | Local History - Maps | The Townships of Prescott County | Towns of Prescott County Lovell's Directory
Post Offices & Postmasters | 1902 Trade Index