Open data portal of the federal government where you can find data, tools, and resources to conduct research, develop web and mobile applications, design data visualizations, and more. Includes data from state and county entities. Browse by topic, filter by location, organization, topic, format, etc. The data comes from the United States government as well as state, city, and county resources.

This is the biggest of the economic data activities undertaken by the Census Bureau. It began in 1930 as an outgrowth of the Census of Manufactures and other reports on economic activity. Information is shown by industry code (NAICS from the 1997 Census forward and SIC for prior years) and geographically by state with industry code breakdowns. In addition to displaying data by industry codes, the Economic Census also shows data by Product Codes that can be even more specific. For example, if one were tracking pharmacies, one would use the SIC/NAICS for independent pharmacies. But to capture those supermarkets with pharmacies, one would use the SIC/NAICS for supermarkets and then look for the product code for those supermarkets that have pharmacies. There are also several subsets of data that are updated more frequently. Those include: the Annual Survey of Manufactures, the Annual Retail Trade Survey, and the Annual Wholesale Trade Survey. Another report to be aware of is the Franchise Statistics Report.
It was produced at varying intervals until 1967 but since then it has been issued once every five years. The Economic Census shows data on the national and state level. The Bureau web page has data from the Censuses for 1992, 1997, and 2002 (and going forward) though under Economic Census By Year, data goes back to 1977.