| Ampoi | |
| Name Other: | Ompoly |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Alba County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Izvoru Ampoiului, Zlatna, Feneș, Meteș, Șard |
| Mouth: | Mureș |
| Mouth Location: | near Alba Iulia |
| Mouth Coordinates: | 46.054°N 23.597°W |
| Tributaries Left: | Vâltori, Feneș, Ampoița, Ighiu |
| Tributaries Right: | Galați |
The Ampoi (hu|Ompoly) is a river in the Apuseni Mountains, Alba County, western Romania. It is a right tributary of the river Mureș. It flows through the town Zlatna, and joins the Mureș near Alba Iulia.[1] Its length is 43km (27miles) and its basin size is 250km2.
The following rivers are tributaries to the Ampoi (from source to mouth):