Tuamarina (often spelled Tua Marina) is a small town in Marlborough, New Zealand.

[3][4] The name is a corruption of the Māori word Tuamarino, which means 'the calm beyond'.

Dairy farming is the major economic activity,.The original Factory was the Waitohi Co-op which amalgamated with the Koromiko cheese factory and the Rai Valley Co-op to form the Marlborough Cheese Company in 1981.

The new Company continued Waitohi's long history winning a number of awards[5] Marlborough Cheese was taken over by Fonterra Dairy Company in 1999. it was destroyed by fire in 2004.

The Wairau Affray occurred in the area in 1843, resulting in 26 deaths.

Significant floods have occurred in the Tuamarina area, such as one in December 1939.

[7] Tuamarina is defined by Statistics New Zealand as a rural settlement.

[8] Tuamarina statistical area surrounds the settlement and also includes Rārangi.