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Figure D22 is a State maps of Massachusetts showing substate region definitions in terms of Census tracts, specified by a 6-digit tract identifier.
The substate region referred to as Boston is made up of tracts 400100 - 401200 in Norfolk County; tracts 000100 - 180500 in Suffolk County.
The substate region referred to as Central is made up of tracts 813800 in Hampden County; tracts 300100 - 302200 and 325100 - 327103 in Middlesex County; tracts 408101, 408102, and 442101 - 443102 in Norfolk County; tracts 700100 - 702200, 705100 - 739500, and 743100 - 761100 in Worcester County.
The substate region referred to as Metrowest is made up of tracts 320101 - 324100, 331101 - 333600, 338100 - 338500, and 350100 - 388100 in Middlesex County; tracts 402101 - 407100, 409101 - 420302, nd 422100 - 441202 in Norfolk County; tracts 500101 - 501202 and 504101 - 505200 in Plymouth County; tracts 740101 - 742400 in Worcester County.
The substate region referred to as Northeast is made up of tracts 201100 - 270100 in Essex County; tracts 310100 - 318400, 328100 - 330200, 334100 - 337300, and 339100 - 342600 in Middlesex County.
The substate region referred to as Southeast is made up of tracts 010100 - 015200 in Barnstable County; tracts 600100 - 655400 in Bristol County; tracts 200100 - 200400 in Dukes County; tracts 950100 - 950500 in Nantucket County; tracts 421100, 421200, and 456101 - 457100 in Norfolk County; tracts 502101 - 503102 and 506101 - 561100 in Plymouth County.
The substate region referre to as Western is made up of tracts 900100 - 935100 in Berkshire County; tracts 040100 - 041500 in Franklin County; tracts 800100 - 813700 in Hampden County; tracts 820101 - 822700 in Hampshire County; tracts 703100 - 704200 in Worcester County.