| Official Name: | Troitsk |
| Native Name: | Троицк |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Kulundinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 52.6167°N 124°W[1] |
Troitsk (Russian: Троицк) is a rural locality (a selo) in Oktyabrsky Selsoviet, Kulundinsky District, Altai Krai, Russia. The population was 180 as of 2013.[2] There are 3 streets.
Troitsk is located 18 km northwest of Kulunda (the district's administrative centre) by road. Oktyabrsky is the nearest rural locality.[3]