| Official Name: | Pahna |
| Native Name: | پهنا |
| Settlement Type: | village |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chaharmahal and Bakhtiari |
| Subdivision Type2: | County |
| Subdivision Name2: | Ben |
| Subdivision Type3: | Bakhsh |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Zayandeh Rud-e Jonubi |
| Population As Of: | 2006 |
| Population Total: | 324 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
Pahna (Persian: پهنا, also Romanized as Pahnā) is a village in Zayandeh Rud-e Jonubi Rural District, Ben County, Chaharmahal and Bakhtiari Province, Iran. At the 2006 census, its population was 324, in 80 families. The village is populated by Turkic people.[1]