Yes. See (http://www.nationalgeographic.com/roper2006/pdf/FINALReport2006GeogLitsurvey.pdf). A survey of 510 US respondents 18-26 years old in 2006 shows 94% of respondents (p26) correctly locate the US on a world map.
The sample isn't going to completely represent all Americans, but I think that it's indicative enough to dispel this idea about 1/3 of Americans not knowing where America is on a world map.
The sample isn't going to completely represent all Americans, but I think that it's indicative enough to dispel this idea about 1/3 of Americans not knowing where America is on a world map.