This list of tallest buildings and structures in Portsmouth ranks buildings and other structures by height in Portsmouth, United Kingdom, that are at least tall.
The tallest building in the city is 1 Gunwharf Quays at , which has been the tallest building in Hampshire since its completion in 2008. The Spinnaker Tower is the city's tallest structure at , completed in 2005; it does not count as a building because it has no floors.
This lists buildings in Portsmouth that are at least tall.
An equal sign (=) following a rank indicates the same height between two or more structures.
This lists buildings and structures in Portsmouth that were at least tall and have since been demolished.
The history of tall buildings in Portsmouth only really began in the 1960s and 1970s. The Spinnaker Tower has been the tallest structure in the city since 2005.