The decennial census and the American Community Survey provide a rich source of data on population, socio-economics ahd housing. A good place to start is with data.census.gov, a search portal.
The main business censuses occur every five years with updates provided by a series of surveys and reports.
Read the complete FAQ from the Census Bureau on the NAICS and look up a NAICS codes.
|What is NAICS and how is it used?|
The North American Industry Classification System (NAICS, pronounced Nakes) was developed under the direction and guidance of the Office of Management and Budget (OMB) as the standard for use by Federal statistical agencies in classifying business establishments for the collection, tabulation, presentation, and analysis of statistical data describing the U.S. economy. Use of the standard provides uniformity and comparability in the presentation of these statistical data. NAICS is based on a production-oriented concept, meaning that it groups establishments into industries according to similarity in the processes used to produce goods or services. NAICS replaced the Standard Industrial Classification (SIC) system in 1997.