T
- (Mayo County) Tobernaveen
- (Mayo County) Tawnagh
- (Mayo County) Terrybaun
- (Mayo County) Tawnykinaff
- (Mayo County) Tawnylaheen
- (Mayo County) Toormore West
- (Mayo County) Treannagleragh
- (Mayo County) Trimoge Bridge
- (Mayo County) Treanybrogaun
- (Mayo County) Tawnagh Beg
- (Mayo County) Tawnaghmore
- (Mayo County) Tullysleva
- (Sligo) Tullylin
- (Mayo County) Tooreen
- (Mayo County) Tullaghanduff
- (Mayo County) Tristia
- (Mayo County) Tallagh
- (Mayo County) Tawnynaboll
- (Mayo County) Treanagh
- (Mayo County) Tawnaghmore
- (Mayo County) The Neale
- (Mayo County) Tallagh
- (Mayo County) Trawboy
- (Mayo County) Tonmore
- (Mayo County) Tonamace
- (Mayo County) Trawnanaskil
- (Mayo County) Tullaghaunnashammer
- (Mayo County) Tawnanasool
- (Mayo County) Tiraun
- (Mayo County) Tonacroaghaun