| Official Name: | Nikolayevka |
| Native Name: | Николаевка |
| Settlement Type: | Village |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Loktevsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 51.0667°N 105°W[1] |
Nikolayevka (Russian: Николаевка) is a rural locality (a selo) and the administrative center of Nikolayevsky Selsoviet of Loktevsky District, Altai Krai, Russia. The population was 458 as of 2016.[2] There are 10 streets.
Nikolayevka is located 14 km north of Gornyak (the district's administrative centre) by road. Gornyak is the nearest rural locality.[3]