T
- (Mayo County) Treanlaur
- (Mayo County) Tawnamullagh
- (Mayo County) Tiraninny
- (Mayo County) Tulleague
- (Mayo County) Toorard
- (Mayo County) Treanrevagh
- (Mayo County) Tullyroe
- (Mayo County) Treanfohanaun
- (Mayo County) Tonroe
- (Mayo County) Tawnaghlahard
- (Mayo County) Tawnagh
- (Mayo County) Tawnaghmore
- (Mayo County) Togher
- (Mayo County) Tooreen
- (Mayo County) Turlough
- (Mayo County) Treanacally
- (Mayo County) Tawnyinah Lower
- (Mayo County) Tawnyinah Middle
- (Mayo County) Tonroe
- (Mayo County) Tullyganny
- (Mayo County) Tumgesh
- (Mayo County) Tullynahoo
- (Mayo County) Tober
- (Mayo County) Tonnagh
- (Mayo County) Toomour
- (Sligo) Tawnagh
- (Sligo) Townaghbrack
- (Sligo) Toomour
- (Sligo) Tawran
- (Sligo) Tawnaghmore