This section provides a list of the tallest buildings in the world by country, featuring the single highest building within each nation. The data includes only those buildings that are either completed or topped out. Currently, 25 countries contain supertall skyscrapers exceeding , while four nations possess megatall skyscrapers surpassing . Although many nations completed their tallest buildings during the 2010s, certain countries remain defined by historical landmarks. For instance, the Caana temple at Caracol in Belize, which dates to approximately the 9th century CE, continues to serve as the tallest building in the nation.
Completed or topped out This list includes the single tallest building in each country, restricted to buildings that are either completed or topped out. Heights are measured to the architectural top, a calculation that incorporates permanent spires while excluding non-architectural elements such as antenna masts.