| Official Name: | Qaleh Now-ye Mehdiabad |
| Native Name: | قلعه نومهدي اباد |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Nishapur |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Darbqazi |
| Population As Of: | 2006 |
| Population Total: | 249 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.1128°N 58.9347°W |
Qaleh Now-ye Mehdiabad (Persian: قلعه نومهدي اباد, also Romanized as Qal‘eh Now-ye Mehdīābād; also known as Mahdīābād and Mehdīābād-e Qal‘eh Now) is a village in Darbqazi Rural District, in the Central District of Nishapur County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 249, in 59 families.