This is a list of the tallest habitable buildings on the island of Ireland (used for living and working in, as opposed to masts and churches). This includes both Northern Ireland in the United Kingdom, and the Republic of Ireland. The island of Ireland has relatively few tall buildings. The island's first tall building was Liberty Hall, built in 1965, which stands at . The current tallest habitable building on the island of Ireland is the Obel Tower in Belfast, Northern Ireland at . The tallest storied building in the Republic of Ireland is College Square in Dublin, at about 82 metres (269 ft).
This list only includes cities with buildings taller than 50 metres (165'). Cities in light blue are in Northern Ireland.
The below list contains details of notable buildings with a planned height of over which were under construction when the project was stopped or cancelled.