This list of the tallest buildings and structures in Belfast ranks buildings and structures in Belfast, Northern Ireland by height. There are at least 10 structures in the city taller than and there are at least 36 habitable buildings in the city taller than .
Tallest by category
The tallest building in Belfast is the Obel Tower at . It is the tallest building in Northern Ireland and the island of Ireland. The tallest structure in Belfast is the Black Mountain Tv mast at 228.6 metres (750 ft). The tallest free standing and occupied structure is the Harland and Wolf shipbuilding gantry crane Samson at 106 metres (348 ft). The tallest chimney is the Belfast City Hospital chimney at 95 metres (312 ft). The tallest church is Belfast (St. Anne's) Cathedral at 80 metres (262 ft). The tallest clock is the Albert Memorial Clock at 34.4m (113 feet).
Belfast's tallest structures
These lists rank the 8 tallest structures in Belfast by total height.
Belfast's tallest habitable buildings
This list is the tallest habitable buildings in Belfast by architectural height.
Tallest non-habitable buildings
List of tallest non Habitable buildings over 45m tall in Belfast. Non-Habitable building refers to a building where most of the height is taken up by an architectural feature which is not habitable such as a spire, or storage space.
Tallest demolished
Tallest buildings and structures in Belfast over 45m to have been demolished.
Potential tall buildings in belfast
Section covers buildings and structures under construction, had planning permission approved and have been proposed for Belfast. Exact heights stated in this section are taken directly from building plans found at and most recent approvals are announced online, where older ones are found in the previous reference.
Under construction
This lists buildings that are currently under construction.
Approved
This lists buildings that have been given planning permission to be constructed in Belfast.
Proposed
This lists buildings that have only been proposed to be built in Belfast.
List of Unbuilt Buildings
Table of tallest proposed buildings that never came to fruition, either due to planning permission or financial issues.