| Zagon | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Covasna County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Zagon, Boroșneu Mare |
| Length: | 21km (13miles) |
| Mouth: | Covasna |
| Mouth Location: | Boroșneu Mare |
| Mouth Coordinates: | 45.8241°N 26.0108°W |
| Basin Size: | 105km2 |
| Tributaries Left: | Telec |
| Tributaries Right: | Zagonul Mic |
The Zagon is a left tributary of the river Covasna in Romania. It flows into the Covasna in Boroșneu Mare. Its length is 21km (13miles) and its basin size is 105km2.