| Erma Reka | |
| Native Name: | Ерма река |
| Native Name Lang: | bg |
| Settlement Type: | Village |
| Subdivision Type: | Country |
| Subdivision Type1: | Oblast |
| Subdivision Type2: | Opština |
| Subdivision Name: |  Bulgaria |
| Subdivision Name1: | Smolyan |
| Subdivision Name2: | Zlatograd |
| Pushpin Map: | Bulgaria |
| Leader Title: | Mayor (Municipality) |
| Leader Name: | Miroslav Yanchev |
| Leader Title1: | Mayor (Town Hall) |
| Leader Name1: | Zarko Hadjiev (GERB) |
| Leader Party: | GERB |
| Area Total Km2: | 28.867 |
| Elevation M: | 663 |
| Population Total: | 751 |
| Population As Of: | 2024 |
| Population Density Km2: | auto |
| Postal Code: | 4997 |
| Area Code: | 03074 |
| Registration Plate: | CM |
Erma Reka is a village in Zlatograd municipality, Smolyan Province, southern Bulgaria, near the border with Greece.
Historically, the village was the site of lead ore mining.[1] [2]