Regions of Ireland
- Tawny
- Tawny
- Tawnawully Mountains
- Tawin Island
- Taurbeg
- Taur
- Tarsaghaunmore River
- Tarmon
- Tarbert House
- Tarbert
- Tara Hill
- Tara Hall
- Hill of Tara
- River Tar
- Lough Tap
- Tanrego House
- Tankersley House
- Tang River
- Tang
- Lough Talt
- Tallyho Lodge
- Tallyho
- Tallow Road Station
- Tallowbridge
- Tallow
- Tallanstown
- Tallaght
- Talbotstown House
- Talbot Hall
- Tahilla
- Tagoat
- Taghshinny
- Taghsheenod
- Taghmon Castle
- Taghmon
- Tacumshin Lake
- Lough Tacker
- Table Mountain
- Sybil Point
- Swords
- Swines Head
- Swinford
- River Swilly
- Lough Swilly
- The Sweep
- Swanlinbar
- Swan
- Sutton
- Sunvale
- Lough Sunderlin
- Summerville
- Summerhill House
- Summerhill House
- Summerhill House
- Summerhill
- Summerhill
- Summer Cove
- Sullane River
- Suir Mount
- Suir Island
- Suircastle House
- River Suir
- Sugarloaf Mountain
- Sugar Hill
- River Suck
- Sturrall
- Stuake
- Stroove
- Strokestown House
- Strokestown
- Street
- Streek Head
- Streedagh Point
- Streedagh House
- Streamstown Bay
- Streamstown
- Streamstown
- Strawberryhill House
- Stratford
- Stranorlar
- Strand
- Strancally House
- Strancally Castle
- Straid River
- Straffan
- Stradone House
- Stradone
- Strade
- Stradbally River
- Stradbally Hall
- Stradbally
- Stradbally
- Stradbally
- Stradbally
- Stowlin House
- Stookaruddan
- Stonyford
- Stonybatter
- Stonetown
- Stonepark
- Stonehall
- Stonefield
- Stone Bridge
- Stokestown
- Stillorgan
- Stephenstown House
- Stepaside
- Station Island
- Stamullin
- Stags of Broad Haven
- Stags of Bofin
- The Stag Rocks
- Stacks Mountains
- Stabannan
- Sruwaddacon Bay
- Srahmore River
- Srahmore
- Srahlaghy
- Srahduggaun
- Srah
- Srah
- Srah
- Spring Valley
- Springfield Castle
- Springfield
- Springfield
- Sporthouse Cross Roads
- Spittle
- Spink
- Spike Island
- Spiddal
- Spear Vale
- Spanish Point
- Spancelhill
- Spa
- River Sow
- Sovereign Islands
- Sovereign Island
- South Sound
- Southpark House
- Southhill
- Sorrel House
- Sorrelhill House
- Sopwell Hall
- Soppog
- Sonna House
- Somerville House
- Somerset House
- Solsborough House
- Snowhill House
- Sneem Harbour
- Sneem
- Slieve Snaght
- Slieve Snaght
- Smithstown House
- Smithborough
- Smerwick Harbour
- Smerwick
- Smearlagh River
- Smarmore Castle
- Slyne Head
- Slugga
- Slish Wood
- Sligo Bay
- Sligo
- Sligo
- Slievetooey
- Slieveroe
- Slievenamuck
- Slievenamon
- Slievenakilla
- Slievemore Point
- Slievemore
- Slievemore
- Slieve Miskish Mountains
- Slieve Mish Mountains
- Slievekimalta
- Slieveglass
- Slievefelim Mountains
- Slievecarran
- Slievecallan
- Slieveboy
- Slieve Bloom Mountains
- Slievebane Bay
- Slieve Aughty Mountains
- Slieveardagh Hills
- Slevoir House
- Sleatygraigue
- Slea Head
- Slate River
- River Slaney
- Slane Castle
- Slane
- Slaheny River
- Slade
- Skycur House
- Skull Harbour
- Schull
- Skreeny House
- Skreen