ASEM Tower, Commercial skyscraper in Gangnam District, Seoul, South Korea.

ASEM Tower is a 176-metre office building in Samseong-dong, Gangnam District, Seoul, with 41 floors above ground and a machine room on the 41st floor. It was originally planned as twin towers but was built as a single block. Offices fill most floors, with the Pivotpoint Business Center on the 30th and 37th floors.

The building was constructed between 1997 and 2000 by three major companies - Daewoo Engineering, Samsung C&T, and Hyundai Engineering - and was created for the Third Asia-Europe Meeting. Its completion marked a time when South Korea was strengthening its presence in global economic forums.

The tower's name comes from the 3rd Asia–Europe Meeting (ASEM 3), held in Seoul in 2000, for which it was built. It appears in the "Gangnam Style" music video: thirty-one seconds in, Psy performs his horse-riding dance in front of the building. It also features in the dramas Ghost, Revolutionary Love and Money Flower, and the 2019 film Girl Cops.

The building is located near exit 5 of Samseong Station on Seoul Subway Line 2, making arrival by public transit straightforward. The site is easy to reach on foot and well connected to the rest of the business district.

The Millennium Festival selected this tower as a symbol of the new millennium, illuminating the entire structure during celebrations on January 1, 2000. The lighting made the building a visible landmark in that worldwide celebration.