How many MSA are there in the US?

384 metropolitan statistical areas
As of March 2020, there are 384 metropolitan statistical areas and 543 micropolitan statistical areas in the United States.

What is included in a metropolitan statistical area?

The OMB defines a Metropolitan Statistical Area as one or more adjacent counties, or county equivalents, that have at least one urban core area of at least 50,000 population, plus adjacent territory that has a high degree of social and economic integration with the core as measured by the commuting tie.

How many CBSA are there in the US?

927 core
The United States Office of Management and Budget (OMB) has defined 927 core-based statistical areas (CBSAs) for the United States and 12 for Puerto Rico.

Why is OMB reviewing metropolitan statistical area standards?

Periodic review of the standards is necessary to ensure their continued usefulness and relevance. OMB reviews the statistical area standards and, if warranted, revises them prior to their application to new decennial census data. The current review of the metropolitan and micropolitan statistical area standards is the seventh such review.

How are metropolitan and micropolitan statistical areas defined?

The United States Office of Management and Budget (OMB) delineates metropolitan and micropolitan statistical areas according to published standards that are applied to Census Bureau data. Metropolitan and Micropolitan Population Change: 2000 to 2010

How long has the metropolitan area program been around?

Background The metropolitan area program has provided standard statistical area delineations for approximately 70 years.

How many metropolitan areas are there in the United States?

For a list of all US metropolitan areas regardless of size, see List of primary statistical areas of the United States. The United States Office of Management and Budget (OMB) has defined 392 metropolitan statistical areas (MSAs) for the United States and eight for Puerto Rico.