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Census Tract Information
The revised Form 477 requires broadband providers to
submit data on a census-tract basis. The Federal
Financial Institutions Examination Council Geocoding System provides
a useful resource for matching individual service-location addresses
to census tracts.
The Census Bureau provides guidance
on identifying census tracts and locating resources for matching service-location
addresses with their census tracts.
- Information posted in the Census Bureau guide, Part I, includes,
for example: year 2000 census tract numbers (by county) in two separate
text files, for Alabama through Montana and Nebraska through Wyoming
and Puerto Rico, and year 2000 census tract outline maps for individual
counties, in PDF format. (The Census Bureau also provides a listing
of County boundary changes after
2000.)
- In this list
of vendors, item 8, the Census Bureau has listed some of the
many commercial vendors of Geocoding, Address Matching software
or services.
The entire area and population of a county are covered by census tracts.
Census tracts within a county are identified by a four-digit
basic number between 0001 and 9999, and may have a two-digit numeric
suffix ranging from .01 to .98; for example, 6059.02. The decimal point
separating the four-digit basic tract number from the two-digit suffix
is shown in Census Bureau printed reports and maps. However, in computer-readable
files prepared by the Census Bureau, the decimal point is implied, and
does not appear. See the Census
2000 Geographic Definitions for more information.
A census tract number may not be used more than once in a single county,
but it may be used again in a different county in the same state or in
a county in a different state. Therefore, a particular census
tract within the nation can be fully identified by: its state, its county,
and its census tract number. Alternatively, the particular census tract
can be identified by an 11-digit number consisting of a 2-digit code
for the state, a 3-digit code for the county (either
of which may include one or more “leading” zeros), and 6 digits for the census
tract (including any leading zeros, and also two “trailing” zeros
in the many cases in which the basic census tract number has no suffix).
For example, the Office of the California Secretary of State, located
at 1500 11th St, Sacramento, CA 95814, can be fully identified by the
11-digit number 06067000900, in which:
06 - identifies California,
067 - identifies Sacramento
County within California, and
000900
- identifies census tract 9 within Sacramento County.
The 2-digit state code and 3-digit county code are Federal Information
Processing Standards (FIPS) codes. See the FIPS
6-4 County Lookup in which the “Search by county name” function will
provide both state and county FIPS codes.
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