The Otago and Southland Regiment (1948-2012) was a Territorial Force unit of the New Zealand Army.

[1][2] In 1964 the unit was renamed the 4th Otago and Southland Battalion Group.

[3] The Regiments motto was Kia Mate Toa (Fight unto Death) and Regimental Belt had the Mackenzie Tartan pattern of the Queen's Own Highlanders.

The regimental badge uniquely contained a full Māori chief.

The Otago and Southland Regiment became the 4th Otago and Southland Battalion Group, with the following unit types: In December 2012 4th Otago and Southland Battalion Group merged with 2nd Canterbury (Nelson, Marlborough, West Coast) Battalion Group to form 2/4 Battalion.