Internal Revenue Service Tax Statistics examine tax returns to report on such things as sources of income, exemptions, use of medical savings accounts, migration, and geographic data, tax information on foreign corporations controlled by U.S. parent corporations, exports, international boycotts, and investments and activities in the U.S. by foreign persons.
USAspending.gov is the official source for spending data for the U.S. government. Learn about the size of the federal budget, and how the government spends that money on a national level and around the country.
States and Capitals Basic facts of the fifty states, commonwealths, and territories of the United States with links to more detailed information.
State Health Facts "Contains the latest state-level data on demographics, health, and health policy, including health coverage, access, financing, and state legislation." From the Kaiser Family Foundation.