Every year the U.S Government publishes a great deal of information on a variety of topics. Almost all this is freely available to the public. On this page are some of my favorite online U.S. government resaources.
Here are my favorite search engines for locating free U.S. government information.
Rebecca Arazola, the Govenment Documents Librarian has created a great U.S. government guide.
I find the Statistics page, which links you various govenment statistics as welll as the Research Collections page, which provides links to all the various government libraries very helpful.