| Carlow Mayo | |
| Official Name: | Township of Carlow Mayo |
| Settlement Type: | Township (lower-tier) |
| Flag Size: | 120x100px |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Mapsize: | 200 |
| Pushpin Label Position: | top |
| Coordinates: | 45.1333°N -114°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | County |
| Established Title: | Settled |
| Established Date: | 1850s |
| Established Title2: | Incorporated |
| Established Date2: | January 1, 2001 |
| Government Type: | Township |
| Leader Title: | Mayor |
| Leader Name: | Randy Wallace |
| Leader Title1: | Federal riding |
| Leader Title2: | Prov. riding |
| Area Land Km2: | 390.79 |
| Area Footnotes: | [1] |
| Population As Of: | 2016 |
| Population Footnotes: | [2] |
| Population Total: | 864 |
| Population Density Km2: | 2.2 |
| Utc Offset: | -5 |
| Utc Offset Dst: | -4 |
| Postal Code: | K0L 1G0 |
Carlow Mayo is a township in northern Hastings County in Eastern Ontario, Canada. It was formed in 2001 by the amalgamation of the townships of Carlow and Mayo.
Historically, the economy in the area was based on timber and mining. The Little Mississippi River and York River were used to transport logs out of the forests. Now, tourism is an important part of the local economy. Over half of the land in the region is designated crown land.
Carlow and Mayo were named after the counties of the same name in Ireland (County Carlow and County Mayo).
Communities within the municipal boundaries include: Bessemer, Boulter, Childs Mines, Craigmont, Fort Stewart, Hartsmere, Havergal, Hermon, McArthur Mills, New Carlow, and Rowland.
In the 2021 Census of Population conducted by Statistics Canada, Carlow/Mayo had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 385.32km2, it had a population density of in 2021.[3]
Mother tongue: