Popular Unions of Bipartisan Social Groups (Greek: Λαϊκές Ενώσεις Υπερκομματικών Κοινωνικών Ομάδων (ΛΕΥΚΟ), LEFKO) is a minor Greek political party.
Tha party was established in June 1989 by Konstantinos Dalios (Greek: Κωνσταντίνος Ντάλιος), who was MP candidate with Union of the Democratic Centre in 1981.
Dalios is the leader of the party.