Marina Alex (born August 2, 1990) is an American professional golfer.
Alex played college golf at Vanderbilt University. She won one tournament, the 2010 SEC Championship. She qualified for the 2009 U.S. Women's Open as an amateur but missed the cut.
Alex turned professional in 2012 following the NCAA Championship. She played on the Symetra Tour in 2012 and 2013 with a best finish of second at the 2013 Four Winds Invitational. She finished third on the money list in 2013 to earn an LPGA Tour card for 2014.
Alex has played on the LPGA Tour since 2014 and won her first event at the 2018 Cambia Portland Classic.