Singapore is a highly urbanised country with over 10,000 completed high-rises, the majority located in the Downtown Core, its central business district (CBD). In the CBD, there are over 100 skyscrapers. The Guoco Tower currently holds the title of the tallest building in Singapore. It stands at 283.7 m, exempted from the height restriction of 280 m in the CBD. A supertall tower will be built at the current AXA Tower site in the future, standing at 305 m. Singapore's history of skyscrapers began with the 1939 completion of the 17-storey Cathay Building. The 70 m structure was, at the time of its completion, the tallest building in Southeast Asia; it was superseded by the 87 m Asia Insurance Building in 1954, which remained the tallest in Singapore for more than a decade. Singapore went through a major building boom in the 1970s and 1980s that resulted from the city's rapid industrialisation. During this time OUB Centre (present-day One Raffles Place) became the tallest building in the city-state; the 280 m structure was also the tallest building in the world outside of North America from its 1986 completion until 1989. The skyscraper-building boom continued during the 1990s and 2000s, with 30 skyscrapers at least 140 m tall, many of them residential towers, constructed from 1990 through 2008. Since 2000, there has been a sharp increase in the number of skyscrapers under construction in the city area, particularly in the Marina Bay district. One project completed in Marina Centre is the Marina Bay Financial Centre, which includes 3 office towers offering 3000000 sqft of office space, 2 residential developments offering 649 apartments and a 176000 sqft retail mall, named Marina Bay Link Mall. There are also several new developments in the city's shopping hub, Orchard Road. The Orchard Residences is a 218 m, 52-floor tower built in conjunction with ION Orchard, a shopping centre just beside Orchard MRT station. In addition, the 245 m Ocean Financial Centre, a 43-floor skyscraper, is built in Raffles Place. With the Jurong Lake District envisioned as Singapore's second CBD, more skyscrapers are shaping the skyline there as well. The JTC Summit, a 142 m office tower built in 2000, currently stands as the tallest building outside the Central Region of the country.

Tallest buildings

This lists ranks Singapore skyscrapers that stand at least 150 m tall, based on standard height measurement. This includes spires and architectural details but does not include antenna masts. An equal sign (=) following a rank indicates the same height between two or more buildings. The "Year" column indicates the year in which a building was completed. {{legend|#ddffdd|Was the tallest building in Southeast Asia upon completion|border=solid 1px #AAAAAA}}

Under construction

This lists buildings that are under construction in Singapore. A floor count of 40 stories is used as the cutoff for buildings whose heights have not yet been released by their developers.

• Table entries without text indicate that information regarding them has not yet been released.

Timeline of tallest buildings

This lists commercial buildings that once held the title of tallest building in Singapore. As of 2016, the title of tallest building in Singapore is held by Guoco Tower.