- see also Leeds & Grenville County, which is immediately to the east of Frontenac County
- see also Lennox & Addington County, which is immediately to our west.
- If you know the town but not the township or county:
- Use the Ontario Locator.
- Scroll down.
- Type the town in the box that says Type Place Here.
- Consult the appropriate branch of the Ontario Genealogical Society.