| Enniskillen | |
| Official Name: | Township of Enniskillen |
| Settlement Type: | Township (lower-tier) |
| Flag Size: | 120x100px |
| Mapsize: | 200px |
| Pushpin Map: | CAN ON Lambton#Canada Southern Ontario |
| Pushpin Mapsize: | 200 |
| Coordinates: | 42.8167°N -89.5°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | County |
| Established Title: | Settled |
| Established Date: | 1830s |
| Established Title2: | Incorporated |
| Established Date2: | 1855 |
| Leader Title: | Mayor |
| Leader Name: | Kevin Marriott |
| Leader Title1: | Federal riding |
| Leader Title2: | Prov. riding |
| Area Land Km2: | 338.16 |
| Population As Of: | 2016 |
| Population Footnotes: | [1] |
| Population Total: | 2796 |
| Population Density Km2: | 8.3 |
| Utc Offset: | -5 |
| Utc Offset Dst: | -4 |
| Postal Code: | N0N |
| Website: | www.enniskillen.ca |
Enniskillen is a township in the Canadian province of Ontario, within Lambton County. It is located at the intersection of Highway 21 (Oil Heritage Road) and Rokeby Line. The economy of the township is based on agriculture. It was named after Sir Galbraith Lowry Cole's father who was the Earl of Enniskillen, Northern Ireland.
The township comprises the communities of Oil City, Glen Rae and Marthaville, and surrounds but does not include the independent municipalities of Petrolia and Oil Springs.
In the 2021 Census of Population conducted by Statistics Canada, Enniskillen had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 338.05km2, it had a population density of in 2021.[2]