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The U.S. State of Connecticut currently has nine statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated two combined statistical areas, five metropolitan statistical areas, and two micropolitan statistical areas in Connecticut.^[1] As of 2023, the largest of these in the state is the New Haven-Hartford-Waterbury, CT CSA, encompassing the entire state outside of the Bridgeport-Stamford-Danbury, CT MSA in the southwest.

Background

The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico.^[2] These statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities.

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]

The OMB defines a combined statistical area (CSA) as two or more adjacent core-based statistical areas where the employment interchange rate (% commuting from A to B plus % commuting from B to A) is at least 15%.^[2] The 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.

Table

The nine United States statistical areas and nine planning regions^[3] of the State of Connecticut^[a]
Combined statistical area^[1]	2023 population (est.)^[4]	Core-based statistical area^[1]	2023 population (est.)^[4]	County-equivalent	2023 population (est.)^[4]	Metropolitan division^[1]	2023 population (est.)^[4]
New Haven-Hartford-Waterbury, CT CSA	2,665,618	Hartford-West Hartford-East Hartford, CT MSA	1,151,543	Capitol Planning Region, Connecticut	975,328	none
		Hartford-West Hartford-East Hartford, CT MSA	1,151,543	Lower Connecticut River Valley Planning Region, Connecticut	176,215
		New Haven, CT MSA	568,158	South Central Connecticut Planning Region, Connecticut	568,158
		Waterbury-Shelton, CT MSA	456,128	Naugatuck Valley Planning Region, Connecticut	456,128
		Norwich-New London-Willimantic, CT MSA	279,634	Southeastern Connecticut Planning Region, Connecticut	279,634
		Torrington, CT μSA	113,463	Northwest Hills Planning Region, Connecticut	113,463
		Putnam, CT μSA	96,692	Northeastern Connecticut Planning Region, Connecticut	96,692
New York-Newark, NY-NJ-CT-PA CSA	21,859,598 951,558 (CT)	New York-Newark-Jersey City, NY-NJ MSA	19,498,249	Kings County, New York	2,561,225	New York-Jersey City-White Plains, NY-NJ MD	11,864,322
				Queens County, New York	2,252,196
				New York County, New York	1,597,451
				Bronx County, New York	1,356,476
				Westchester County, New York	990,817
				Bergen County, New Jersey	957,736
				Hudson County, New Jersey	705,472
				Passaic County, New Jersey	513,395
				Richmond County, New York	490,687
				Rockland County, New York	340,807
				Putnam County, New York	98,060
				Suffolk County, New York	1,523,170	Nassau County-Suffolk County, NY MD	2,904,885
				Nassau County, New York	1,381,715	Nassau County-Suffolk County, NY MD	2,904,885
				Middlesex County, New Jersey	863,623	Lakewood-New Brunswick, NJ MD	2,379,977
				Ocean County, New Jersey	659,197
				Monmouth County, New Jersey	642,799
				Somerset County, New Jersey	348,842
				Essex County, New Jersey	851,117	Newark, NJ MD	2,167,829
				Union County, New Jersey	572,726
				Morris County, New Jersey	514,423
				Sussex County, New Jersey	146,132
				Hunterdon County, New Jersey	130,183
		Bridgeport-Stamford-Danbury, CT MSA	951,558	Western Connecticut Planning Region, Connecticut	623,907	none
		Bridgeport-Stamford-Danbury, CT MSA	951,558	Greater Bridgeport Planning Region, Connecticut	327,651
		Kiryas Joel-Poughkeepsie-Newburgh, NY MSA	704,620	Orange County, New York	407,470
		Kiryas Joel-Poughkeepsie-Newburgh, NY MSA	704,620	Dutchess County, New York	297,150
		Trenton-Princeton, NJ MSA	381,671	Mercer County, New Jersey	381,671
		Kingston, NY MSA	182,333	Ulster County, New York	182,333
		Monticello, NY μSA	79,920	Sullivan County, New York	79,920
		Hemlock Farms, PA μSA	61,247	Pike County, Pennsylvania	61,247
State of Connecticut					3,617,176

Notes

^ An out-of-state area and its population are displayed in green. An area that extends into more than one state is displayed in purple. A purple population number over a black population number show the total population versus the in-state population. The state's abbreviation is also shown next to the in-state total.

References

^ ^a ^b ^c ^d Revised 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). "0MB BULLETIN NO. 23-01" (PDF). Office of Management and Budget. Retrieved October 23, 2023.{{cite web}}: CS1 maint: multiple names: authors list (link)
^ ^a ^b ^c ^d ^e "2020 Standards for Delineating Core Based Statistical Areas". Office of Management and Budget. July 16, 2021. Retrieved December 13, 2021.
^ "Regional Planning Organizations (RPO)". State of Connecticut Office of Planning and Management. 2024. Retrieved May 23, 2024.
^ ^a ^b ^c ^d "County Population Totals and Components of Change: 2020-2023". United States Census Bureau, Population Division. March 2023. Retrieved May 21, 2024.