Oamaru is the largest town in North Otago, situated on the Pacific coast of New Zealand's South Island. It serves as the main administrative centre for the Waitaki District, which encompasses surrounding settlements such as Kurow, Weston, Palmerston, and Hampden. Geographically, the town lies between rolling limestone hills and a short stretch of flat land leading to the sea, positioned 80 kilometres south of Timaru and 120 kilometres north of Dunedin.

The town was laid out in 1858 by provincial surveyor John Turnbull Thomson, who named its early streets after British rivers. Its name derives from Māori, translating to 'the place of Maru,' though the identity of Maru remains conjectural. European settlement grew rapidly in the 1850s and 1860s, boosted by harbour development and an export trade in wool and grain. A significant engineering feat was the construction of a breakwater between 1871 and 1884 to protect vessels from the coast.

Oamaru is defined by its distinctive Victorian architecture crafted from locally sourced limestone known as Oamaru stone or whitestone. This material lent itself to carving by designers like John Lemon and Thomas Forrester, creating an impressive array of buildings that earned the town the title of the best built in Australasia during the 1880s. The town sits in the shelter of Cape Wanbrow, with Friendly Bay serving as a popular recreational area on the harbour's edge.

The town is renowned for its colonies of little blue penguins and yellow-eyed penguins, attracting visitors to view these birds in their natural habitat. It has also become a self-proclaimed capital of Steampunk, hosting an annual festival in June, while celebrating its Victorian heritage with a festival in November. The surrounding Waitaki Valley offers wine appellation vineyards producing Pinot Noir and Riesling, alongside hydroelectric dams that create lakes for water sports.

Oamaru has a population of 13,700 as of 2020, though earlier sources cite 14,300 residents. The local economy benefits from the meat, dairy, and education industries, supporting exceptional restaurants and reasonable accommodation prices. Access is provided via State Highway 1 and the Main South Line railway, connecting it to Dunedin and Timaru. State Highway 83 links the town to the Mackenzie Basin via the Waitaki Valley.