- Khong city is a city in the Dak Nong Province of Vietnam. It is located in the Central Highlands region of the country. Khong city is known for its beautiful natural landscapes, including mountains, waterfalls, and forests. The city has a rich cultural heritage, with a diverse mix of ethnic groups living in the area. Khong city is also a popular destination for eco-tourism activities, such as hiking, camping, and exploring the local flora and fauna.