奥马鲁（英语：Oamaru；毛利语：Te Oha-a-Maru），北奥塔哥最大的一个城镇，位于新西兰南岛，是怀塔基区的主要城镇。距离南面的蒂马鲁 80 公里，距北面的达尼丁 120 公里。

Oamaru (/ɒməˈruː/; (Māori:Te Oha-a-Maru), the largest town in North Otago, in the South Island of New Zealand, is the main town in the Waitaki District. It is 80 kilometres south of Timaru and 120 kilometres north of Dunedin, on the Pacific coast, and State Highway 1 and the railway Main South Line connect it to both. With a population of 13,750, Oamaru is the 27th largest urban area in New Zealand, and the second largest in Otago behind Dunedin.