A survey for public broadcaster ARD showed the 72-year-old Schaeuble is more popular than his boss, Chancellor Angela Merkel, who had a rating of 67 percent. Foreign Minister Frank-Walter Steinmeier topped the popularity ratings with 73 percent.

ARD said it was the highest rating for Schaeuble.

Schaeuble has been praised in the conservative German media in recent weeks for refusing to bow to the demands of Greek Prime Minister Alexis Tsipras in negotiations over a bailout extension.

Top-selling daily Bild, which has campaigned for the euro zone to cut the Greeks loose, included a picture of Schaeuble in a superhero costume in its Thursday edition last week, declaring him "Euroman" and praising him for defending the currency in the face of the "Greek rescue circus".

In contrast, Schaeuble is widely disliked in Greece, where some newspapers have run cartoons of him dressed as a Nazi. A survey last month showed that only 14 percent of Greeks view him positively, compared to 39 percent for Merkel.

(Writing by Noah Barkin; Editing by Alison Williams)