| Official Name: | Ostuh |
| Native Name: | استوه |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Markazi |
| Subdivision Type2: | County |
| Subdivision Name2: | Khondab |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Qareh Chay |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Sang Sefid |
| Population As Of: | 2006 |
| Population Total: | 2,363 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 34.325°N 49.2431°W |
Ostuh (Persian: استوه, also Romanized as Ostūh, Estooh, and Estūh; also known as Ustāf) is a village in Sang Sefid Rural District, Qareh Chay District, Khondab County, Markazi Province, Iran. At the 2006 census, its population was 2,363, in 623 families.