Kaikorai Valley is a long broad valley which runs through the west of the New Zealand city of Dunedin, 5 kilometres (3.1 mi) to the west of the city centre. It is the valley of a small stream, the Kaikorai Stream, which runs from northeast to southwest down the length of the valley.
The valley provides a route into central Dunedin (Kaikorai Valley Road) which avoids the steep climb and descent over Lookout Point into Caversham, instead allowing for a gradual climb to the top of Stuart Street, Dunedin before a steep drop into the heart of the city. The valley contains several suburbs, largely isolated from the city centre by the ridge which forms the valley's eastern edge. This ridge was part of the crater wall of the long-extinct Dunedin Volcano.
The valley is largely occupied by light industrial and wholesale businesses. Much of the land to the west of the valley is semi-rural; the eastern wall contains residential properties.
The valley is home to three distinct suburbs: Kaikorai, Bradford, and Kenmure, while a fourth suburb, Burnside, lies at the valley's mouth, close to the junction of Kaikorai Valley Road and the Dunedin Southern Motorway, part of State Highway 1.
The suburb of Kaikorai sits at the head of the valley. This suburb is largely residential, sitting close to the junction of Kaikorai Valley Road and Stuart Street, to the west of which Stuart Street becomes Taieri Road. Taieri Road links with the outer suburbs of Halfway Bush and Helensburgh before traversing the rugged Three Mile Hill, eventually emerging on the Taieri Plains. A complex junction links Stuart Street, Taieri Road, and Kaikorai Valley Road, and also provides a link with Highgate, the main road through the suburbs of Roslyn (which lies on the ridge immediately to the east of Kaikorai) and Maori Hill. The suburb of Wakari lies immediately to the northwest of Kaikorai.