U.S. federal and state agencies gather and compile data on communities, economics, business, health, crime, and more. These sites help you find that data by browsing agencies or subjects or by searching.
U.S. government’s open data site. "Growing from 47 datasets in 2009 to nearly 450,000 datasets today, Data.gov reaches across 172 federal agencies to bring data to innovators, developers, analysts and citizens across the nation."
Use the Database Browser to identify financial and economic data sources. Most of the databases cost money, so be sure to find the FREE tab at the top of database lists to discover which ones are free to use. You will need to create a free account to export data.