| Official Name: | Masoudabad |
| Native Name: | مسعوداباد |
| Settlement Type: | village |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Qazvin |
| Subdivision Type2: | County |
| Subdivision Name2: | Qazvin |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Rudbar-e Alamut |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Alamut-e Bala |
| Population As Of: | 2006 |
| Population Total: | 690 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
Masoudabad (Persian: مسعوداباد, also Romanized as Mas‘ūdābād) is a village in Alamut-e Bala Rural District, Rudbar-e Alamut District, Qazvin County, Qazvin Province, Iran. At the 2006 census, its population was 690, in 211 families.