It is important to know the difference between data (the raw information used to create statistics) and statistics (data that has been analyzed and interpreted). Data and statistics are found around the web, published by federal and state government, international agencies and governments, private firms and organizations. Gathering and recording of statistics and data can be mandatory by law or just voluntary. Here are some tips for finding statistics and data online.
Define your goals - this will help you decide where to look.
Are you looking for summary statistics or raw/micro data to do your own analysis?
What geographic region and level of geography do you need?
What is the time period you are interested in?
Do you need one point or a time series?
It’s helpful to think about who might have collected the data you're looking for such as governmental bodies, organizations, business/trade groups, or commercial entities and see what data they have available.