| Tay | |
| Official Name: | Township of Tay |
| Settlement Type: | Township (lower-tier) |
| Pushpin Map: | CAN ON Simcoe#Canada Southern Ontario |
| Pushpin Label: | Tay |
| Pushpin Label Position: | right |
| Coordinates: | 44.7167°N -125°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | County |
| Subdivision Name2: | Simcoe |
| Leader Title: | Mayor |
| Leader Name: | Ted Walker |
| Leader Title1: | Governing Body |
| Leader Title2: | MPs |
| Leader Name2: | Bruce Stanton |
| Leader Title3: | MPPs |
| Leader Name3: | Jill Dunlop |
| Established Title: | Incorporated |
| Established Date: | 1994 |
| Area Total Km2: | 139.07 |
| Population As Of: | 2016 |
| Population Footnotes: | [1] |
| Population Total: | 10033 |
| Population Density Km2: | 72.1 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | Postal code FSA |
| Area Code: | 705, 249 |
| Website: | www.tay.ca |
Tay is a township in Central Ontario, Canada, located in Simcoe County in the southern Georgian Bay region. The township was named in 1822 after a pet dog of Lady Sarah Maitland (1792–1873), wife of Sir Peregrine Maitland, Lieutenant Governor of Upper Canada. Two other adjoining townships were also named for her pet dogs, Tiny and Flos (now Springwater Township).[2]
The current territory of Tay was home to the Wendat towns of Teanaostataé (St. Louis), and Taenhatentaron (St. Ignace). Together with the nearby town of Teanaustayé (St. Joseph) in nearby Hillsdale they were destroyed by the Iroquois (Haudenosaunee) in 1648–1649. During this warfare, the Jesuits Jean de Brébeuf and Gabriel Lalemant were killed at Taenhatentaron.[3]
In 1994, under countywide municipal restructuring, the Villages of Port McNicoll and Victoria Harbour were amalgamated with Tay.
The township comprises the villages and rural hamlets of Ebenezer, Elliots Corners, Melduf, Mertzs Corners, Ogden's Beach, Old Fort, Paradise Point, Port McNicoll, Riverside, Sturgeon Bay, Triple Bay Park, Vasey, Victoria Harbour, Waubaushene and Waverley.
In the 2021 Census of Population conducted by Statistics Canada, Tay had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 137.86km2, it had a population density of in 2021.[4]