The summit was held at the David L. Lawrence Convention Center in Pittsburgh , Pennsylvania , United States on September 24 &ndash; 25 , 2009 . Announced shortly after the April 2009 G20 London summit , U.S. President Barack Obama volunteered to host this summit , initially planning to hold it in New York City and coordinating it with the opening of the United Nations General Assembly . However , due to coordination issues , on May 28 , 2009 , the Obama Administration announced a change of venue to Pittsburgh in order to highlight the city 's economic recovery following the collapse of its manufacturing sector in the latter half of the 20th century . In response to the Global credit crisis , a G20 summit in one year was proposed shortly after the London summit in April 2009
2009 G20 London summit
2009 G20 London summit
2009 G20 Pittsburgh summit