The U.S. Government agency responsible for collecting and publishing the bulk of industry statistics is the U.S. Census Bureau, a division of the Commerce Department. Reports based on these statistics are organized by NAICS, the North American Industry Classification System. [http://www.census.gov/ eos/www/naics/] You can also use the Free NAICS Look Up from the NAICS Association.
Every five years (years ending in 2 and 7), a comprehensive Economic Census is conducted to gather details about economic activity by sector and by state, and, in most cases, for counties and cities as well.
You can also explore the Industry Statistics Portal for data from many sources. [http://www.census.gov/econ/isp/]
Note: An older classification system still in use is the SIC - Standard Industrial Classification. [http://www.osha.gov/cgi-bin/sic/sicser5]
The Business Source Elite database at JerseyClicks will provide articles published in hundreds of trade journals and business magazines. Click on the database link and enter your local public library card number. You can then select the database and search for articles on industry overviews and trends, as well as marketing products and services. [http://www.jerseyclicks.org]
Dozens of Small Business Snapshots or industry sectors are profiled by the SBDC National Information Clearinghouse. [http://www.sbdcnet.org/category/small-business-research-reports]
Selected Industry Statistics and Financial Ratios are available for sole proprietorships and corporations from BizStats. [http://www.bizstats.com]
A short list of eleven industry sectors are covered by Boogar Associates' Associations: Directory. [http://www.boogar.com/resources/associations/]