Andrea Hansen MNZM (née Hewitt, born 4 April 1982) is a New Zealand triathlete who placed third at the 2009 ITU Triathlon World Championships and competed at the 2008, 2012, and 2016 Summer Olympics.

She lived together with the French triathlete Laurent Vidal, who was also her coach and fiancé, in Sète on the Mediterranean from May to December, and for the rest of the year she returned to Christchurch until his death on 10 November 2015 from a heart attack.

[2] She was a well known swimmer when at the beginning of 2005, at the age of 22, she decided to convert to triathlon and straight away won the bronze medal at the New Zealand U23 Championships and was admitted to the National Team.

In 2007, she won her first World Cup race in Kitzbühel and began taking part in the prestigious French Club Championship Series Lyonnaise des Eaux.

In 2009, Hewitt took part in seven out of eight competitions of the Dextro Energy World Championship Series and won three medals: gold in Madrid, silver in Yokohama and bronze in Kitzbühel, in the overall ranking she placed third.