The Small Business Administration (SBA) now offers SizeUp, a free online tool for business owners to compare their businesses with others in their industries using hundreds of public and private sources. SizeUp provides geographic information including suggesting areas for advertising campaigns.
Like many government programs, it’s not perfect and it doesn’t translate for every company. At the least, the comparative revenue information may be enlightening. You can find this tool at http://www.sba.gov/sizeup.