The Union of the Democratic Centre (Greek: Ένωση Δημοκρατικού Κέντρου, abbr.

ΕΔΗΚ, Enosi Dimokratikou Kentrou, EDIK) is a social liberal political party in Greece.

With the Greek political spectrum shifting to the left, EDIK was increasingly marginalized, with PASOK replacing it as the country's second major party.

The party's support collapsed in the elections of 1981, when it gained 0.7% of the vote and was shut out of Parliament.

Consequently, in the May 2012 election the party participated as part of the Coalition of the Radical Left (SYRIZA).