Standard & Poor's provides insight into industry ratios within its industry reports.
Example: I want to find out what key industry ratios are related to my company, Boeing.
Type boeing into the search box at the top of the screen and click search
Go to the left-hand side of the screen and go to the section for "My Links" and then select Industry Surveys
Go to the "Aerospace & Defense" heading and click the PDF icon
Look for the sections on "Key Ratios and Statistics" and "How to Analyze a Company in this Industry" for help identifying the ratios and financial statement items that are the most important to evaluate the company's financial health.
Robert Morris Associates (RMA) Annual Statement Studies provides financial ratios for several industries. Industries are organized by NAICS codes and fairly narrow industries such as masonry contractors and jewelry stores are included. These ratios are the composite averages of several small and midsized businesses. You can download the reports into Excel.