| Adjala-Tosorontio | |
| Official Name: | Township of Adjala-Tosorontio |
| Settlement Type: | Township (lower-tier) |
| Motto: | Welcome home. |
| Pushpin Map: | CAN ON Simcoe#Canada Southern Ontario |
| Coordinates: | 44.1333°N -135°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | County |
| Subdivision Name2: | Simcoe |
| Established Title: | Settled |
| Established Date: | 1820s |
| Established Title2: | Formed |
| Established Date2: | January 1, 1994 |
| Leader Title: | Mayor |
| Leader Name: | Scott W. Anderson |
| Leader Title1: | Federal riding |
| Leader Name1: | Simcoe—Grey |
| Area Land Km2: | 372.34 |
| Population Total: | 10975 |
| Population As Of: | 2016 |
| Population Footnotes: | [1] |
| Population Density Km2: | 29.5 |
| Population Blank2 Title: | Growth |
| Population Blank2: | 3.5% (2011-2016) |
| Area Codes: | 705, 519, 905 |
| Leader Title2: | Prov. riding |
| Leader Name2: | Simcoe—Grey |
| Timezone: | EST |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
Adjala–Tosorontio is a township in south-central Ontario, Canada, in the County of Simcoe.
A predominantly rural area, Adjala–Tosorontio contains numerous small villages and hamlets. Many communities were started in Adjala by Irish Catholics who named their hamlets after their home towns in Ireland, or after prominent pioneer families who first settled the area. The municipality has increasingly become home to residents who commute to the Greater Toronto Area.
Geographically the area is rolling countryside below the Niagara Escarpment to the west, with the Nottawasaga River cutting through it.
"Tosorontio" is a Huron word meaning "Beautiful Mountain", and Adjala was the name of the wife of Chief Tecumseh, for whom the neighbouring township (now called New Tecumseth) was named.[2]
Adjala–Tosorontio Township was created in 1993 when the County of Simcoe Act merged the townships of Adjala and Tosorontio. The amalgamation took effect on January 1, 1994.[3]
The township comprises the communities of Achill, Airlie, Athlone, Ballycroy, Cedarville, Colgan, Connor, Everett, Glencairn, Hockley, Keenansville, Lisle, Loretto, Rosemont, Sheldon, Tioga and Tuam.
Loretto (44.05°N -79.8903°W) is one of the oldest communities in Adjala–Tosorontio. It has one of the oldest and most famous taverns in Simcoe County, the Loretto Inn. Highway 50 runs through the town.
Loretto was named after Loreto, Marche in Italy.[4]
In the 2021 Census of Population conducted by Statistics Canada, Adjala-Tosorontio had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 371.53km2, it had a population density of in 2021.[5]