| Official Name: | Pervomayskoye |
| Native Name: | Первомайское |
| Native Name Lang: | ru |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Bryansk Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Bryansk Oblast |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Pochepsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +3:00 |
| Coordinates: | 52.8833°N 69°W[1] |
Pervomayskoye (Russian: Первомайское), before 1940 - P'yany Rog (Russian: Пьяный Рог), is a rural locality (a selo) and the administrative center of Pervomayskoye Rural Settlement, Pochepsky District, Bryansk Oblast, Russia. In the 19th century the village was part of Krasnorogskaya volost, Mglinsky Uyezd, Chernigov Governorate.[2] The population was 881 as of 2010.[3] There are 18 streets.
Pervomayskoye is located 12 km southeast of Pochep (the district's administrative centre) by road. Popovka is the nearest rural locality.[4]