| Official Name: | Shad Dehsar |
| Native Name: | شاددهسر |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gilan |
| Subdivision Type2: | County |
| Subdivision Name2: | Lahijan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Layalestan |
| Population As Of: | 2006 |
| Population Total: | 802 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Coordinates: | 37.2336°N 50.0025°W |
Shad Dehsar (fa|شاددهسر, also Romanized as Shād Dehsar; also known as Shādehsar) is a village in Layalestan Rural District, Central district, Lahijan County, Gilan Province, Iran. At the 2016 census, its population was 359, in 126 families.[1], down from 802 people in 2006.
The village is located north of Lahijan's city limits, near the road between the Lahijan and Rudboneh.[2]