| Official Name: | Zasosna |
| Native Name: | Засосна |
| Native Name Lang: | ru |
| Settlement Type: | Khutor |
| Pushpin Map: | Russia Voronezh Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Voronezh Oblast |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Ostrogozhsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +3:00 |
| Coordinates: | 50.7667°N 96°W[1] |
Zasosna (Russian: links=no|Засосна) is a rural locality (a khutor) in Olshanskoye Rural Settlement, Ostrogozhsky District, Voronezh Oblast, Russia. The population was 78 as of 2010.[2] There are 2 streets.[3]
Zasosna is located 19 km southwest of Ostrogozhsk (the district's administrative centre) by road. Nizhny Olshan is the nearest rural locality.[4]