In The Hunger Games, the nation of Panem (implied to be North America after some sort of post apocalyptic scenario) is divided into 13 districts and the Capitol. District 12 is hinted to be in the Appalachia Mountains, and the Capitol is hinted to be in the Rocky Mountains. District 13, which was destroyed, is described as "east of District 12", which made me think it's where Washington D.C. is today.
The other districts, however, were mostly ignored, and almost no detail was provided as to their locations in the books. Has there been any supplemental information that reveals where the districts are?