Small Business Marketing: The Ultimate Guide To Niche Analysis
Glenn Allsop has put together an extensive list of resources to find data on several industries and online niches.
Here are several additional resources:
Stats by Zip Code here
Finding Statistics by Zip Code : Overview | Oviatt Library
http://library.csun.edu/Guides/ZipCode
Gross Profit of each industry and other stats here
Free Business Statistics, Financial Ratios and Industry Statistics by BizStats
http://www.bizstats.com/
US Census and Economic Data
https://www.census.gov/econ/
Industry Report Search Engine
http://www.reportlinker.com/
