The 2017 Southeast Asian Games, officially known as the 29th Southeast Asian Games, or the 29th SEA Games, and commonly known as Kuala Lumpur 2017, was a Southeast Asian multi-sport event that took place from 19 to 30 August 2017 in Kuala Lumpur, Malaysia. This was the sixth time that Malaysia hosted the games and its first time since 2001. Previously, it had also hosted the 1965, 1971, 1977 and 1989 editions of the games. The 2017 edition is most notable for being the first edition to include winter sports.

Kuala Lumpur, officially the Federal Territory of Kuala Lumpur and colloquially referred to as KL, is a federal territory and the capital city of Malaysia. It is the largest city in the country, covering an area of 243 km2 (94 sq mi) with a census population of 2,163,000 as of 2022. Greater Kuala Lumpur, also known as the Klang Valley, is an urban agglomeration of 8.622 million people as of 2023. It is among the fastest growing metropolitan regions in Southeast Asia, both in population and economic development. Klang Valley is ASEAN's fifth largest economy after Singapore, Jakarta, Bangkok, and Manila.