The Hundred of Port Gawler is a cadastral unit of hundred located on the central Adelaide Plains in South Australia and bounded on the south by the Gawler River.

[1] It is centred on the town of Two Wells with the locality of Port Gawler at the south western corner of its boundary.

[1] The following localities and towns of the Adelaide Plains Council area are situated inside (or largely inside) the bounds of the Hundred of Port Gawler: The first local government body established in the area was the District Council of Mudla Wirra, proclaimed in 1854.

North of the River Light it was not until 1873 that local government was formed by the establishment of the District Council of Dublin which encompassed both the Hundred of Dublin and that unincorporated north western part of the Hundred of Port Gawler.

This brought the entire hundred under the local governance of a single council body.