[KrisKrinkle]

“One Third of all Land in the United States Owned by the Federal Government”

Proof or it ain’t true.

[thackney]

The Federal Government owns nearly 650 million acres of land - almost 30 percent of the land area of the United States.

http://nationalatlas.gov/printable/fedlands.html

National Atlas is part of the Department of the Interior.

[Sopater]

Proof or it ain’t true.

I don't know if this is "proof", but here's a map of Federal owned lands and indian reservations from 2005.