This dataset includes expert estimates on the policy positions of 12 Greek political parties on more than 40 policy issues as well as scaled positions on the economic left-right and social liberal/conservative dimensions. Expert estimation was conducted through the Delphi method. The data were previously used in the Choose4Greece (http://www.choose4greece.com/) voting advice application (VAA) which was launched during the January and September 2015 parliamentary elections in Greece.