| Rât | |
| Name Other: | Háporton-patak |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Alba County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Hopârta, Lopadea Nouă, Ciumbrud |
| Length: | 15km (09miles) |
| Mouth: | Mureș |
| Mouth Location: | Ciumbrud |
| Mouth Coordinates: | 46.301°N 23.757°W |
| Basin Size: | 76km2 |
| Tributaries Left: | Odverem |
The Rât (Hungarian: Háporton-patak) is a left tributary of the river Mureș in Transylvania, Romania. It discharges into the Mureș in Ciumbrud.[1] Its length is 15km (09miles) and its basin size is 76km2.