Subdivisions
- Beckwith (township)
- Carleton Place (town)
- Drummond/North Elmsley (township)
- Lanark Highlands (township)
- Mississippi Mills (town)
- Montague (township)
- Perth (town)
- Tay Valley (township)
While the town of Smiths Falls is physically within the boundaries of the county, it is a separated municipality and is not under the administration of the county government.
Read more about this topic: Lanark County