Marsha Cox (née Marescia; born 13 January 1983 in Durban, KwaZulu-Natal) is a field hockey player from South Africa, who was a member of the national squad that finished 9th at the 2004 Summer Olympics in Athens. The midfielder comes from Durban, and is nicknamed Nator. She plays for the provincial team Southern Gauteng.
Marsha is the South African team captain. She made her début in October 2001 at the age of 18 and has since gone on to represent her country at three Olympic Games and two World Cups, earning over 300 caps.
Marsha is the daughter hockey coach and former player Marian Marescia, described by many as the best player to not have played for South Africa, due to apartheid.
In 2013 Marsha married Dutch hockey coach Alexander Cox.
- 2002 – Champions Challenge (Johannesburg, South Africa)
- 2002 – Commonwealth Games (Manchester, UK)
- 2002 – World Cup (Perth, Australia)
- 2003 – All Africa Games (Abuja, Nigeria)
- 2003 – Afro-Asian Games (Hyderabad, India)
- 2004 – Olympic Games (Athens, Greece)
- 2005 – Champions Challenge (Virginia Beach, United States)
- 2006 – Commonwealth Games (Melbourne, Australia)
- 2006 – World Cup (Madrid, Spain)
- 2008 – Olympic Games (Beijing, PR China)
- 2009 – Champions Challenge (Cape Town, South Africa)
- 2010 – World Cup (Rosario, Argentina)
- 2010 – Commonwealth Games (New Delhi, India)
- 2011 – Champions Challenge (Dublin, Ireland)
- 2011 – All Africa Games (Bulawayo, Zimbabwe)
- 2012 – Women's Olympic Qualifier (New Delhi, India)