Konstadina Efedaki
 Konstadina Efedaki (Greek: Κωνσταντίνα Εφεντάκη; born October 1 1978 in Athens) is a Greek middle distance runner. She is a two-time national champion (2003–2004) for the 1500 metres.Efedaki represented the host nation Greece at the 2004 Summer Olympics coincidentally in her home city where she placed twelfth in the semi-final rounds of the women's 1500 metres with a time of 4:09.37.At the 2008 Summer Olympics in Beijing Efedaki competed for the second time in the 1500 metres.