D-K
- Derrynane House - Catherdaniel, County Kerry - Ancestral home of Daniel O'Connell.
- Desmond Castle - Kinsale, County Cork - a 16th century Custom house.
- Desmond Hall - Newcastlewest, County Limerick a 15th century Castle.
- Donegal Castle - Donegal, County Donegal - a 15th century Norman tower house with the addition of a 17th century Jacobean Manor House.
- Doneraile Park - Doneraile, County Cork - an 18th century landscaped park.
- Dromore Wood - Ennis, County Clare - Nature reserve.
- Dun Aonghasa - Inishmore, Aran Islands, County Galway - A prehistoric stone fort.
- Dungarvan Castle - Dungarvan, County Waterford, Castle with a 12th century shell keep, with curtain wall, corner tower and gate tower.
- Dunmore Caves - Ballyfoyle, County Kilkenny - limestone cave, site of Viking massacre in 928.
- Dwyer McAllister Cottage - Derrynamuck, County Wicklow - a traditional whitewashed cottage historically linked with the 1798 Rebellion.
- Emo Court - Emo, County Laois - a neo-classical house with extensive parklands
- Ennis Friary - Ennis, County Clare - 13th century Franciscan Friary.
- Ferns Castle - Ferns, County Wexford - 13th century castle featuring circular chapen, original fireplaces and a vaulted basement.
- Fota Gardens - Fota Island, Carrigtwohill, County Cork – 110,000 square metre park with ornamental pond and Italian walled gardens.
- Gallarus Castle - Ballydavid, County Kerry - a pre 1600 castle on the Dingle Peninsula built by the Knight of Kerry.
- Glebe House and Gallery - Churchill, Letterkenny, County Donegal - Regency House.
- Glendalough - Glendalough, County Wicklow - monastic site founded in 6th century, site has a Round Tower, stone churches and multiple stone crosses.
- Glenveagh National Park - Churchill, Letterkenny, County Donegal - 170 square kilometres of mountains, woodland and lakes.
- Heywood Gardens - Ballinakill, County Laois - Formal garden designed by Sir Edward Lutyens
- Hill of Tara - Navan, County Meath - Seat of the High Kings of Ireland, Pre-Christian center of political and religious power.
- Blasket Center - Dunchaoin, County Kerry - interpretation center for native language, culture and tradition of Blasket Islanders.
- Garnish Island - Bantry, County Cork - Island garden sheltered in Glengarriff harbour.
- Jerpoint Abbey - Thomastown, County Kilkenny - Cistercian monastery.
- JFK Arboretum - New Ross, County Wexford - 2.52 square kilometre arboretum dedicated to US President John F. Kennedy.
- Kilkenny Castle - Kilkenny, County Kilkenny - castle with extensive parklands.
- Killarney National Park - Killarney, County Kerry - 103 square kilometres of mountains, woodlands including the Lakes of Killarney.
Read more about this topic: Heritage Sites (Ireland)