| Type: | town |
| St Johns | |
| State: | sa |
| Coordinates: | -34.3628°N 138.9594°W |
| Postcode: | 5373 |
| Lga: | Light Regional Council |
| Stategov: | Stuart |
| Fedgov: | Barker |
| Near-N: | Kapunda |
| Near-E: | Koonunga |
| Near-S: | Moppa |
| Near-W: | Fords |
St Johns is a locality southeast of Kapunda in the northern Barossa Valley, South Australia. Originally a private subdivision on sections 1450, 1451 and 1533 of the Hundred of Belvidere,[1] the boundaries of the locality were formalised in 2000 and the name formally adopted based on long-established use.[2]
The foundation stone for the St John the Evangelist church was laid on 2 April 1850, however the building was not completed until 30 April 1854. A school was opened in 1859, run by the Sisters of St Joseph of the Sacred Heart after 1868. From 1897, the school became a reformatory for girls until it closed in 1909.[3]