| Lopatna | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Prahova County |
| Length: | 23km (14miles) |
| Mouth: | Matița |
| Mouth Location: | Matița |
| Mouth Coordinates: | 45.1403°N 26.1632°W |
| Progression: | Matița→ |
| Basin Size: | 85km2 |
The Lopatna (also: Lopanta) is a right tributary of the river Matița in Romania. It discharges into the Matița in the village Matița. It flows through the villages Cărbunești, Surani, Șoimari, Măgura and Matița. Its length is 23km (14miles) and its basin size is 85km2.