| Official Name: | Kozmodemyanovka |
| Native Name: | Козьмодемьяновка |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Amur Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Amur Oblast |
| Subdivision Name3: | Tambovsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +9:00 |
| Coordinates: | 50.1333°N 142°W[1] |
Kozmodemyanovka (ru|Козьмодемьяновка) is a rural locality (a selo) and the administrative center of Kozmodemyanovsky Selsoviet of Tambovsky District, Amur Oblast, Russia. The population was 1,482 as of 2018.[2] There are 9 streets.
Kozmodemyanovka is located on the Gilchin River, 18 km northeast of Tambovka (the district's administrative centre) by road. Chuyevka is the nearest rural locality.[3]