| Official Name: | Jaja |
| Native Name: | جاجا |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Isfahan |
| Subdivision Type2: | County |
| Subdivision Name2: | Tiran and Karvan |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Rezvaniyeh |
| Population As Of: | 2006 |
| Population Total: | 289 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 32.7342°N 51.0917°W |
Jaja (Persian: جاجا, also Romanized as Jājā and Jā Jā; also known as Chah Jā, Chāhjah, Chāhjeh, Chājeh, and Shāhjūn) is a village in Rezvaniyeh Rural District, in the Central District of Tiran and Karvan County, Isfahan Province, Iran. At the 2006 census, its population was 289 in 88 families.