| Official Name: | Bidun |
| Native Name: | بيدون |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Isfahan |
| Subdivision Type2: | County |
| Subdivision Name2: | Ardestan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Kachu |
| Population As Of: | 2006 |
| Population Total: | 11 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 33.2689°N 52.6139°W |
Bidun (Persian: بيدون, also Romanized as Bīdūn; also known as Dīdūn) is a village in Kachu Rural District, in the Central District of Ardestan County, Isfahan Province, Iran. At the 2006 census, its population was 11, in 4 families.