| Official Name: | Khoshmardan |
| Native Name: | خوشمردان |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Razavi Khorasan |
| Subdivision Type2: | County |
| Subdivision Name2: | Sabzevar |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Rud Ab |
| Subdivision Type4: | Rural District |
| Population As Of: | 2006 |
| Population Total: | 171 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.8683°N 57.6292°W |
Khvosh Mardan (Persian: خوشمردان, also Romanized as Khosh Mardan or Khvosh Mardān; also known as Khvūsh Mardān) is a village in Khavashod Rural District, Rud Ab District, Sabzevar County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 171, in 62 families.