The Strath Taieri (sometimes spelt Strath-Taieri) is a large glacial valley and river plateau in New Zealand's South Island. It is surrounded by the rugged hill ranges to the north and west of Otago Harbour. Since 1989 it has been part of the city of Dunedin. The small town of Middlemarch is located at its southern end.
The name is a hybrid word, from Strath (anglicised Irish and Scots Gaelic srath), meaning a broad river valley, and the Māori name Taieri (alternative spelling Taiari) of the river which runs through it.