| Official Name: | Siya |
| Native Name: | Сия |
| Settlement Type: | Settlement |
| Pushpin Map: | Russia Arkhangelsk Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Arkhangelsk Oblast |
| Subdivision Name3: | Pinezhsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +3:00 |
| Coordinates: | 64.0167°N 53°W[1] |
Siya (Russian: Сия) is a rural locality (a settlement) and the administrative center of Siyskoye Rural Settlement of Pinezhsky District, Arkhangelsk Oblast, Russia. The population was 1,336 as of 2010.[2] There are 6 streets.
Siya is located 94 km west of Karpogory (the district's administrative centre) by road. Syloga is the nearest rural locality.[3]