Page:Geographic Areas Reference Manual (GARM).pdf/27

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Figure 2-3. Small Area Geography in the 1990 Census

First-Order Subdivision
(Typically a County)

Second-Order Subdivision
(Typically an MCD, CCD, or UT)

Place
(Incorporated or Census Designated)

Census Tract or
Block Numbering Area (BNA)

Block Group (BG)

Block

Geographic Overview2-9