The OMB defines a core-based statistical area (commonly referred to as a CBSA) as the county or counties (or county-equivalents) surrounding at least one densely-settled core of at least 10,000 population,[2] "plus adjacent counties having a high degree of social and economic integration with the core as measured through commuting ties with the counties containing the core".[2] The OMB further divides core-based statistical areas based on population into metropolitan statistical areas (MSAs) for those with at least 50,000 and micropolitan statistical areas (μSAs) for those with 10,000 to 49,999 people.[2]
Primary statistical areas (PSAs) include all combined statistical areas and any core-based statistical area that is not a constituent of a combined statistical area. Of the four statistical areas of Hawaiʻi, all are PSAs comprising two metropolitan statistical areas and two micropolitan statistical areas.
The four primary statistical areas of the State of Hawaiʻi
^ abcRevised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, and Guidance on Uses of the Delineations of These Areas (July 21, 2023). "OMB BULLETIN NO. 23-01"(PDF). Office of Management and Budget. Retrieved November 5, 2023.{{cite web}}: CS1 maint: multiple names: authors list (link)