Metropolitan Statistical Areas (MSAs), Micropolitan Statistical Areas, Metropolitan Divisions, and Combined Statistical Areas (CSAs)
Statistical areas are defined (geographically delineated) by the Office of Management and Budget and the definitions are updated as new information warrants. Statistical areas are defined by the Office of Management and Budget (OMB) in bulletin no. 13-01 issued February 28, 2013. When OMB adds a new statistical area, BEA creates a time series for it starting in the earliest year even though it may not have had any urban area at the time. Similarly, when OMB changes the definition of a statistical area, BEA recreates the time series for that area, using the new definition for every year in the time series, published at the scheduled release date of the data set.
 OMB metropolitan area revision bulletins
Choose from the box below to see a list of the areas and their component counties.