SS Wimmera was a steamship that was sunk on 26 June 1918 following contact with a German mine north of Cape Maria van Diemen, New Zealand, killing 26 passengers and crew. Wimmera was built in Greenock, Scotland in 1904. She was owned by the Australian company Huddart Parker. On 25 June the ship left Wellington bound for Sydney travelling by way of Three Kings Islands. There were 76 passengers and 75 crew on board. The ship sank when it ran into a sea mine laid by the German raider Wolf.