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Guyed masts
* RTÉ Radio 1 Medium Wave mast, Tullamore, 290m
* Longwave transmitter, Clarkestown, 245m
* LORAN-C mast, Loop Head, 219m
* RTÉ television transmitter, Mullaghanish, 152m
[edit] Freestanding structures
* Power station chimneys, Moneypoint, 218m
* Power station chimneys, Poolbeg, Chimney 1 - 207.48m, Chimney 2 - 207.8m
* Power station chimneys, Kilroot*, 198m
[edit] Spired buildings
* Saint John's Cathedral, Limerick, 93.8m
* St Colman's Cathedral, Cobh, 91.4m
* St. Mary's Cathedral, Killarney, 86.8m
* St Patrick's Church, St Patrick's College, Maynooth, 83m
* St. Eugene's Cathedral, Derry*, 78m
* St. Macartan's Cathedral, Monaghan, 74.6m
* Saint Fin Barre's Cathedral, Cork, 73m
* Cathedral of St. Eunan and St Colmcille, Letterkenny, 73m
* Church of SS Augustine and John, Dublin, 70m
* Pro-Cathedral of St. Peter and St. Paul, Ennis, 69m
* Sacred Heart Church, Omagh*, 68.6m
* Saint Patrick's Cathedral, Dublin, 66m
* Saint Patrick's Cathedral (Roman Catholic), Armagh*, 64m
* Saint George's Church, Dublin, 61m
[edit] Storeyed buildings
* Windsor House, Belfast*, 80m
* Belfast City Hospital Tower*, 74m
* Cork County Hall, 67m
* Hilton Hotel, Belfast*, 63m
* BT Riverside Tower, Belfast*, 62m
* Divis Tower, Belfast*, 61m
* Liberty Hall, Dublin, 59.4m
* Riverpoint, Limerick, 59.2m
* One George's Quay Plaza, Dublin, 59m
* Clarion Hotel, Limerick, 56m
[edit] Other categories
Sculptures
Spire of Dublin, 120m
Gantry Cranes
"Samson", Harland and Wolff, Belfast*, 106m
Bridges
Boyne River Bridge, 95m
Windmills
Kilgarvan Wind Farm (group of 14 Wind Turbines), 93m
Obelisks
Wellington Monument, Phoenix Park, 63m (Tallest in Europe)
Lighthouses
Fastnet Rock Lighthouse, 44.5m
Stadiums
Croke Park, 40m
Moving sculptures
Irish Wave, Park West, Dublin, 35.4m (Tallest in Europe)
Round towers
Kilmacduagh monastery, 34m
Castles
Nenagh Castle Keep, 31m
Standing stones
Punchestown, 6.5m
High crosses
Muiredach's High Cross, Monasterboice, 6.45m
[edit] Planned
* Heuston Gate, Dublin 134m (construction starts in 2007 - 117m excluding the spire)
* Britain Quay Tower (aka. U2 Tower), Dublin 130m (construction starts later this year)
* Point Village , Dublin 120m (construction to start soon)
* Aurora building, Belfast* 109m (awaiting planning permission)
* Obel Tower, Belfast* 80.5m (due for completion in 2007)
* Eglinton St., Cork, 80m (under construction - 70m excluding the spire)