New Zealand competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012. This was the nation's twenty-fourth appearance at the Olympics. The New Zealand Olympic Committee sent 184 athletes, 97 men, and 87 women to the Games to compete in 16 sports, the nation's largest ever delegation.

Dame Lisa Marie Carrington is a flatwater canoeist and New Zealand's most successful Olympian, having won a total of five gold medals and one bronze medal. She won three consecutive gold medals in the Women's K‑1 200 metres at the 2012 Summer Olympics, 2016 Summer Olympics and 2020 Summer Olympics, as well as gold in the same event at the 2011 Canoe Sprint World Championships. At the 2020 Summer Olympics she also won a gold medal in the K‑2 500 metres, with crewmate Caitlin Regal, and as an individual in the K‑1 500 metres.