| 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: | Nemetsky National District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 53.2167°N 121°W[1] |
Nikolayevka (Russian: Николаевка) is a rural locality (a selo) and the administrative center of Nikolayevsky Selsoviet of Nemetsky National District, Altai Krai, Russia. The population was 1077 as of 2016.[2] There are 5 streets.
Nikolayevka is located within the Kulunda Plain, 24 km west of Galbshtadt (the district's administrative centre) by road. Grishkovka is the nearest rural locality.[3]
The village is inhabited by Russians, Germans and others.