| Official Name: | Bolshaya Sludka |
| Native Name: | Большая Слудка |
| Settlement Type: | Village |
| Pushpin Map: | Russia Arkhangelsk Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Arkhangelsk Oblast |
| Subdivision Name3: | Krasnoborsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +3:00 |
| Coordinates: | 61.6167°N 51°W[1] |
Bolshaya Sludka (Russian: Большая Слудка) is a rural locality (a village) and the administrative center of Belosludskoye Rural Settlement of Krasnoborsky District, Arkhangelsk Oblast, Russia. The population was 517 as of 2010.[2]
Bolshaya Sludka is located 16 km northeast of Krasnoborsk (the district's administrative centre) by road. Tolsha 1-ya is the nearest rural locality.[3]