| Changjiang | |
| Other Name: | Ch'ang-chiang, Cheongkong |
| Official Name: | Changjiang Li Autonomous County |
| Pushpin Map: | Hainan |
| Pushpin Label: | Changjiang |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Hainan |
| Settlement Type: | Autonomous County |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Hainan |
| Unit Pref: | Metric |
| Area Total Km2: | 1617 |
| Population As Of: | 1999 |
| Population Density Km2: | auto |
| Population Total: | 225,131 |
| Coordinates: | 19.3661°N 109.0422°W |
| Timezone: | China standard time |
| Utc Offset: | +8 |
Changjiang Li Autonomous County (formerly known by its Cantonese romanization name Cheongkong) is an autonomous county in Hainan, China. It is one of six 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 Town. Shilu is known for a major iron ore deposit (the Shilu Iron Ore Mine, Chinese: 石碌铁矿), which has been worked since the Japanese occupation of the island in the early 1940s.
Changjiang has a tropical savanna climate (Aw). The monthly high temperature exceeds 25 °C (77 °F). The rainy season is from May to October, and the monthly precipitation exceeds 170mm (6.7inches). The Bawangling National Nature Reserve within the territory is home to endangered Hainan gibbons.