Mary Michelle Nunn is an American philanthropic executive and politician. Since 2015 she has been president and CEO of CARE USA, the American national member of CARE International, the humanitarian aid and international development agency. She was CEO of Points of Light, an American nonprofit organization, from 2007 to 2013, and is a member of its board of directors as of 2015. She had been an executive for the volunteer service organization since 1990, previously running the predecessor and member organizations Hands On Atlanta, City Cares, and HandsOn Network. Nunn, a member of the Democratic Party, was her party's nominee in the race for Georgia's U.S. Senate seat in 2014. She is the daughter of former U.S. Senator Sam Nunn.

CARE is a major international humanitarian agency delivering emergency relief and long-term international development projects. Founded in 1945, CARE is nonsectarian, impartial, and non-governmental. It is one of the largest and oldest humanitarian aid organizations focused on fighting global poverty. In 2019, CARE reported working in 104 countries, supporting 1,349 poverty-fighting projects and humanitarian aid projects, and reaching over 92.3 million people directly and 433.3 million people indirectly.