Chāngjiāng Li Autonomous County (Chinese Postal Map Romanisation: Cheongkong) is an autonomous county in Hainan, the People's Republic of China. It is one of 6 counties of Hainan. Its postal code is 572700, and in 1999 its population was 225,131 people, largely made up of the Li people.
The county seat is in Shilu, Hainan Shilu Town. Shilu is known for a major iron ore deposit (the Shilu Iron Ore Mine, 石碌铁矿), which has been worked since the Japanese occupation of the island in the early 1940s.
Changjiang has a monsoon influenced humid subtropical climate, bordering on a tropical savanna climate.
Coordinates: 19°21′58″N 109°02′32″E / 19.366°N 109.0421°E / 19.366; 109.0421