| Tay Valley | |
| Official Name: | Township of Tay Valley |
| Settlement Type: | Township (lower-tier) |
| Mapsize: | 200px |
| Pushpin Map: | Canada Southern Ontario |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | County |
| Subdivision Name2: | Lanark |
| Government Type: | Township |
| Leader Title: | Reeve |
| Leader Name: | Rob Rainer |
| Leader Title1: | Gov. Body |
| Leader Name1: | Tay Valley Township Council |
| Leader Title2: | Federal riding |
| Leader Name2: | Lanark—Frontenac—Lennox and Addington |
| Leader Title3: | Prov. riding |
| Leader Name3: | Lanark—Frontenac—Lennox and Addington |
| Established Title: | Incorporated |
| Established Date: | January 1, 1998 |
| Area Land Km2: | 550.01 |
| Population As Of: | 2016 |
| Population Footnotes: | [1] |
| Population Total: | 5665 |
| Population Density Km2: | 10.3 |
| Timezone: | EST |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | Postal code FSA |
| Area Code: | 613, 343 |
| Coordinates: | 44.8667°N -99°W |
| Website: | www.tayvalleytwp.ca |
Tay Valley is a township in eastern Ontario, Canada, on the Tay River in the southwest corner of Lanark County, adjacent to the United Counties of Leeds and Grenville and Frontenac County. The township administrative offices are located in Glen Tay.
Tay Valley township is distinct from the Township of Tay, 300 km to the west.
The township was incorporated on January 1, 1998 by amalgamating the former townships of Bathurst, South Sherbrooke and North Burgess, which date back to the early 19th century. It was originally known as the township of Bathurst Burgess Sherbrooke, but adopted the name of Tay Valley on July 30, 2002. The Canadian Pacific Railway's original mainline (CP Havelock Subdivision) passed through Glen Tay heading west to Havelock then on to Toronto before being abandoned to Tweed in 1973 and to Havelock in 1987. A newer mainline was branched off west of Glen Tay southwest towards Belleville which still handles the CP Rail traffic from Smith Falls to Toronto.
The township comprises the communities of Althorpe, Bathurst Station, Bells Corners, Bolingbroke, Bolingbroke Siding, Brooke, Christie Lake, DeWitts Corners, Elliot, Fallbrook, Feldspar, Glen Tay, Harper, Maberly, Playfairville, Pratt Corners, Scotch Line, Stanleyville and Wemyss.
The permanent population was 5,925 in the 2021 census. However, similar to adjacent townships, there are also numerous seasonal residents, predominantly cottagers from Ottawa or Kingston. The total population including seasonal residents was estimated over 10,000, in 3,843 households in 2012.[2]
In the 2021 Census of Population conducted by Statistics Canada, Tay Valley had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 528.67km2, it had a population density of in 2021.[3]
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The main roads in the township are Highway 7 and Lanark County Road 10. The Rideau Trail passes through the township, including Murphys Point Provincial Park.