| Tireragh | |
| Native Name: | Tír Fhiachrach (Irish) |
| Settlement Type: | Barony |
| Subdivision Type: | Country |
| Subdivision Name: | Ireland |
| Subdivision Type1: | Province |
| Subdivision Name1: | Connacht |
| Subdivision Type2: | County |
| Subdivision Name2: | Sligo |
| Population Total: | 7,151 |
| Population As Of: | 2016 |
| Population Density Km2: | 16.6 |
| Area Land Km2: | 431.4 |
Tireragh (;)[1] is a barony in County Sligo. It corresponds to the former Gaelic túath of Tír Fhíacrach Múaidhe.
The barony was formed as part of the shiring of County Sligo by the Lord Deputy Sir Henry Sidney.