Guoco Tower is a mixed-use development skyscraper in Tanjong Pagar of the Downtown Core district of Singapore. With a height of 290 m (950 ft), it is currently the tallest building in Singapore, breaking the record held jointly by UOB Plaza, One Raffles Place and Republic Plaza for more than 20 years.

Formerly known as the Tanjong Pagar Centre, the 65-storey, 1.7 million sq ft skyscraper was developed by GuocoLand and designed by Skidmore, Owings & Merrill. It is the headquarters of Guocoland Limited and is the only skyscraper exempted from the height restriction of 280m. Guoco Tower houses the rooftop Urban Park, the Wallich Residence apartment complex, and a hotel by Sofitel Hotels & Resorts.

The development won the 2014 World Architecture News Mixed-Use Award in the Future Projects category, and was shortlisted for the 2015 World Architecture Festival Commercial Mixed-Use Award in the Future Projects category.

In July 2019, British industrialist and designer James Dyson purchased a 21,108 square foot (1,961.0 m) triplex penthouse apartment at the top of the building for £43 million (US$52.8 million). He later sold the flat in October 2020 for £36 million to Chinese American businessman Leo Koguan.

• List of tallest buildings in Singapore
• Architecture of Singapore

Records
Preceded by UOB Plaza One Raffles Place Republic Plaza	Tallest building in Singapore 283.7 m (931 ft) 2016–	Succeeded by Current