Thomastown
- Earl Landaff
- Electoral district of Thomastown
- List of civil parishes of Ireland
- List of townlands of County Clare
- List of townlands of County Down
- List of townlands of County Dublin
- List of townlands of County Fermanagh
- List of townlands of County Kildare
- List of townlands of County Limerick
- List of townlands of County Louth
- List of townlands of County Mayo
- List of townlands of County Meath
- List of townlands of County Offaly
- List of townlands of County Tipperary
- List of townlands of County Westmeath
- List of townlands of County Wicklow
- Madison Parish, Louisiana
- Thomas Town
- Thomaston (disambiguation)
- Thomastown (Parliament of Ireland constituency)
- Thomastown Football Club
- Thomastown GAA
- Thomastown Province
- Thomastown Township, Wadena County, Minnesota
- Thomastown railway station
- Thomastown railway station, Melbourne
- Thomastown, County Kilkenny
- Thomastown, Mississippi
- Thomastown, Rhondda Cynon Taf
- Thomastown, Victoria
- Thomastown, Virginia