1990 Census geographic levels

The following six geographic levels are defined in a self-consistent format. They were derived from GICS (Geographic Information Coding Scheme) with the use of NFS and dBase.

states and state equivalents (60 areas: 51 in US + 9 in territories)
counties (3286 areas: 3141 in US + 145 in territories)
places (23788 areas: 23435 in US + 353 in territories)
place/county parts (24800 areas: 24437 in US + 363 in territories)
county subdivisions (36410 areas: 35298 in US + 1112 in territories)
county subdivision/place parts (61323 areas: 59619 in US + 1704 in territories)

The following geographic levels are defined in other formats.

U.S. Gazetteer place and zipcode Files (from Landview II)
county parts of 5-digit ZIP codes (from 1990 STF3B)
places and counties in the U.S.
103rd Congressional Districts by county or place
block summary statistics (1990 Census STF1B, at CIESIN)
latitude and longitude of Standard Metropolitan Areas
calculating latitude and longitude for ZIP codes
1991 Metropolitan Statistical Areas
relating place names to county names, and vice versa (Nathan Parker)

MABLE/GEOCORR
Master Area Block Level Equivalency (MABLE) geographic correspondence engine
(CIESIN and University of Missouri)

back to "Small area Census data"

http://merrill.olm.net/pdocs/feas/pop/levels90.html 8/30/96
dwmerrill@lbl.gov
http://merrill.olm.net/dwmerrill.html