Quinton James "Jimmy" Cowan (born 6 March 1982) is a New Zealand rugby union footballer. He first played for the All Blacks – New Zealand's national team – during the 2004 tour to the United Kingdom and France, and played his last Test match for the side during the 2011 Rugby World Cup. Cowan was born in Gore and attended Gore High School. After he left school a strong season for the Mataura Rugby Club saw him selected to play provincially for the Southland Stags in 2000. He was selected for the Highlanders in the 2003 Super 12 (now known as Super Rugby) season, and continued to play for both the Highlanders and Southland until signing for Gloucester in 2012.
Cowan was identified as a promising halfback, and is a product of New Zealand's rugby development program. In 2001, he was selected in New Zealand's World Cup Winning Under 19 team. In 2002 and 2003 he was also selected in the New Zealand Colts, winning the Under-21 Rugby World Cup in 2003.
Cowan debuted for the Stags in 2000 at the age of 18. He was quickly recognised as a standout in a weak Stags side and after a good season in 2002, he received a call-up to the Highlanders super rugby franchise. His form with the Southland side benefited from his experience at a higher level of rugby and the Stags back line continued to improve. In 2004, after a great National Provincial Championship competition, Cowan received an All Black call-up for the 2004 end of year tour after becoming the youngest Southlander to bring up 50 games for the province at the age of 22.