Kaeng Krachan Forest Complex (Thai: กลุ่มป่าแก่งกระจาน) is the inscribed name of a UNESCO World Heritage Site in Thailand.

It covers the areas of Kaeng Krachan, Kui Buri and Chaloem Phrakiat Thai Prachan national parks, and Mae Nam Phachi Wildlife Sanctuary, in the Ratchaburi, Phetchaburi and Prachuap Khiri Khan provinces of Western Thailand, on the country's border with Myanmar.

Located at the cross-roads between the Himalayan, Indochina, and Sumatran faunal and floral realms, the property is home to rich biodiversity.

[1] The site was inscribed on the World Heritage list in 2021 at the World Heritage Committee's extended 44th session, amidst controversy surrounding the government's long-standing campaign to forcibly displace the indigenous S'gaw Karen people of Bang Kloi from their village in Kaeng Krachan NP, which also involved the murder of activist Porlajee Rakchongcharoen in 2014.

Days before the inscription, a panel of special rapporteurs for the United Nations Human Rights Council had urged the World Heritage Committee to defer the nomination due to ongoing rights violations, but it was approved with the support of China and Russia, among other countries.