| Ruyuan | |
| Official Name: | Ruyuan Yao Autonomous County |
| Other Name: | Yuyuan |
| Postal Code Type: | Postal code |
| Settlement Type: | County |
| Subdivision Type: | Country |
| Subdivision Name: | People's Republic of China |
| Subdivision Type1: | Province |
| Subdivision Name1: | Guangdong |
| Subdivision Type2: | Prefecture-level city |
| Subdivision Name2: | Shaoguan |
| Area Total Km2: | 2227 |
| Population Density Km2: | auto |
| Coordinates: | 24.8833°N 124°W |
| Timezone: | China Standard |
| Utc Offset: | +8 |
Ruyuan (postal: Yuyuan;), officially Ruyuan Yao Autonomous County, is a county of northern Guangdong province, China, with a small border with Hunan to the northwest. It is under the administration of Shaoguan City.