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Table 3 Spatial and population characteristics of selected areal units of Connecticut.

From: Lumping or splitting: seeking the preferred areal unit for health geography studies

Unit Places Area (sq. km) 1990 Population 20 & Over Persons 20 + years per sq. mile
State 1 12,550 2,443,803 195
County 8 956 to 2,383 72,931 to 635,829 54 to 382
Town 169 13 to 160 443 to 100,552 6 to 2,426
Zip code 263 0.5 to 249 19 to 45,623 9 to 3,943
Census tract 834 <0.01 to 160 0 to 7,507 6 to 9,077
Block group 2,905 <0.01 to 86 0 to 5,415 0 to 21,333
Census block 50,569 Not available 0 to 2,796 Not available