Papandreou also had bilateral meetings with Clinton and a number of other political leaders on the sidelines of the dinner.
The Greek premier's talks with Clinton focused on the international economic situation, and especially the Greek economy.
According to sources, Clinton took a positive position on the Greek government's denationalisations program, considering it a good sign for the markets.
She was also positive on the Greek government's determination in its efforts for implementation of the program to bring the country out of the crisis, and on Papandreou's initiative for consensus with the political forces in the country.
Papandreou and Clinton further exchanged views on the situation in Libya, the Middle East and the Arab world.
The Greek premier also held talks with European Commission president Jose Manuel Barroso chiefly on economy issues.
He further met with Chilean president Michelle Bachelet, French prime minister Francois Fillon, OECD general director Angel Guria, Austrian chancellor Werner Faymann, Hungarian prime minister Viktor Orban, Belgian prime minister Yves Leterme and Mexican foreign minister Patricia Espinosa.
Papandreou returns to Greece on Thursday.