While the Congress link above offers a growing number of hearings in full text, the historical index to the hearings, and numerous other congressional publications, is accessible in the database Congressional Publications.
U.S. Census Bureau offers a variety of statistics at the state level beyond just population and housing. The U.S. Census Bureau conducts a Census of Governments of all state and local government organization units every 5 years, for years ending in 2 and 7, as required by law under Title 13, U.S. Code, Section 161. The collection of these data will