Source: U.S. Bureau of Labor Statistics
An establishment is an economic unit, such as a factory, mine, store, or office that produces goods or services. It generally is at a single location and is engaged predominantly in one type of economic activity. Where a single location encompasses two or more distinct activities, these are treated as separate establishments, if separate payroll records are available, and the various activities are classified under different industry codes.
Federal Reserve Bank of St. Louis and U.S. Bureau of Labor Statistics, Number of Private Establishments for All Industries in Marin County, CA [ENU0604120510], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/ENU0604120510, August 21, 2019.