| Oplotniščica | |
| Name Other: | Oplotnica |
| Mouth Location: | Dravinja |
| Mouth Coordinates: | 46.3228°N 15.4911°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Slovenia |
| Length: | 28km (17miles) |
| Basin Size: | 86km2 |
| Map: | |
The Oplotniščica or Oplotnica[1] is a river in Styria, Slovenia. The river is in length. Its source is on the Pohorje Massif, northeast of Mount Rogla. It passes Osankarica, Lukanja, and Cezlak, runs through Oplotnica and Tepanje, and then merges with the Dravinja near Žiče.