Marianna Lymperta (Greek: Μαριάννα Λυμπερτά, born June 25, 1979)^[1] is an Olympic and national-record holding swimmer from Greece. She has won the bronze medal at the 2011 World Aquatics Championships, at the Open Water Swimming Women's 10 km event.^[2] She has also won the bronze medal at the 2010 European Aquatics Championships, at the Open Water Swimming Women's 5km event.^[2]

She has swum for Greece at the:

• Olympics: 2000, 2004, 2008, 2012
• World Championships: 2003, 2009, 2011, 2013^[3]
• European Championships: 2010
• Mediterranean Games: 2001, 2005, 2013
• Open Water Worlds: 2008, 2010

At the 2010 European Championships, she set the Greek Records in the women's 800 and 1500 free (8:34.81 and 16:20.11).

At the 2012 Summer Olympics, she competed in the Women's marathon 10 kilometre, finishing in last place.^[4]