| Official Name: | Plotinnaya |
| Native Name: | Плотинная |
| Settlement Type: | Railway station |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Kamensky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 53.7833°N 106°W[1] |
Plotinnaya (Russian: Плотинная) is a rural locality (a railway station) of West Siberian Railway in Kamensky District, Altai Krai, Russia. The population was 746 as of 2016.[2] There are 7 streets.
Plotinnaya is located on the right bank of the Ob River, 8 km east of Kamen-na-Obi (the district's administrative centre) by road. Kamen-na-Obi is the nearest rural locality.[3]