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V.
Census 2000 Data Releases
Census 2000 is the first census for which the Internet site is the primary
means of disseminating the data. Whatever you’re looking for, you
will find it first on the Census Bureau’s Web site. In addition
to formatted tables, the Census Bureau Web site has maps and data sets
available for downloading (file transfer protocol (ftp)), printing, viewing,
and manipulating.
Website and American FactFinder
The Census Bureau Web Site provides on-line access to much of the census
and many of its data, publications, products, and programs. Using
the “Subjects A to Z” is an efficient way to research all kinds of census-related
topics.
Census 2000 data users will be very interested in the American FactFinder
(AFF), the Census Bureau’s primary on-line data retrieval tool. AFF already
has data from the 1990 Census, the American Community Survey,
Census 2000 Supplementary Survey, the 1997 Economic Census,
and Census 2000. Data are released on AFF as soon as they
are available, usually on a flow basis, state by state within each series.
The Census Bureau also has created a “Census 2000 Gateway” page to pull
together background information, questionnaires, links to the data sets,
PDF files, tutorials, and other user aids. Data Products In addition
to the large data sets, the Census Bureau also produced a series of briefs
and special reports. These provide background on the topics, and
also explain how the data was analyzed, and differences between 1990 and
2000 Census data.
The titles listed below, plus new Briefs, are listed on the page:
http://www.census.gov/population/www/cen2000/briefs.html
Census 2000 Special Reports
- Demographic Trends in the 20th Century
- Emergency and Transitional Shelter Population: 2000
- Mapping Census 2000: The Geography of U.S. Diversity
- Racial and Ethnic Residential Segregation in the United States:
1980-2000
Census 2000 Briefs:
- The 65 Years and Over Population: 2000
- Age: 2000
- The American Indian and Alaska Native Population: 2000
- The Asian Population: 2000
- The Black Population: 2000
- Congressional Apportionment
- Gender: 2000
- The Hispanic Population (also issued in Spanish)
- Households and Families: 2000
- Housing Characteristics: 2000
- The Native Hawaiian and Other Pacific Islander Population: 2000
- Overview of Race and Hispanic Origin
- Population Change and Distribution: 1990-2000
- The Two or More Races Population: 2000
- The United States in International Context: 2000
- The White Population: 2000
The additional briefs, listed below, will be issued based on sample data.
- Ancestry: 2000
- Disability Status: 2000
- Educational Attainment: 2000
- English Ability: 2000
- Employment Status: 2000
- The Foreign-Born Population: 2000
- Grandparents Living with Grandchildren: 2000
- Home Values: 2000
- Household Income: 2000
- Housing Costs of Homeowners: 2000
- Housing Costs of Renters: 2000
- Journey-to-Work: 2000
- Language Use and Marital Status: 2000
- Occupations: 2000
- Poverty: 2000
- Residential Mobility: 2000
- School Enrollment: 2000
- Structural and Occupancy Characteristics: 2000
- Veterans: 2000
This site also contains links to other PHC-T (Census of Population and Housing)
tables which may be of interest.
100-Percent Data Products
- Redistricting Data Summary File
Provides population counts for all persons and all person 18 years and
over. It also has counts of Hispanic/Latino persons by race (63 categories)
and not Hispanic/Latino persons by race (63 categories) for both the
total population and the population 18 years and over.
Released on: Internet, CD-ROM/DVD;
Lowest level geography: Blocks
- Demographic Profile Selected population and housing characteristics.
Released on: Internet, CD-ROM/DVD (w/Summary File 1), paper
Lowest level geography: Census Tracts
- Congressional District Demographic Profile Same as profile
described above but for Congressional Districts.
Released on: Internet, CD-ROM/DVD (available w/Summary File 1), paper
Lowest level geography: Congressional Districts of the 106th Congress
- Race and Hispanic or Latino Summary File This file provides
the same data as the Redistricting Data Summary File, but for a higher
level of geography.
Released on: Internet (FTP only), CD-ROM
Lowest level geography: Places
- Summary File 1 (SF 1) Presents counts and basic cross-tabulations
of information collected from all people and housing units. SF1
provides population counts for 63 race categories and Hispanic or Latino,
and population counts for many detailed race and Hispanic or Latino
categories, and American Indian and Alaska Native tribes [Urban/rural
data are on the final national file].
Released on: Internet,
CD-ROM/DVD
Lowest level geography: Blocks
- Summary File 2 (SF 2) Similar to SF1, this file contains 100-percent
population and housing characteristics, but tables in this file are
given for the United States, and a selected list of detailed race and
Hispanic- or Latino- origin groups, as well as American Indian and Alaska
Native tribes. Each of the 250 population groups is subject to
a population threshold. [Urban/rural data are on the
final national file]
Released on: Internet,
CD-ROM/DVD
Lowest level geography: Census Tracts
- Advanced Query Function (100% data) Allows user specified
tabulations from full microdata file; Includes safeguards against disclosure
of identifying information about individuals and housing units.
Released on: Internet
Lowest level geography: Block Groups
- Summary Population and Housing Characteristics (PHC-1) This
report contains information collected from all people and housing units.
This report will be issued for each state, the District of Columbia,
Puerto Rico, and a national summary volume.
Released on: Internet, paper
Lowest level geography: Places
- Population and Housing Unit Counts (PHC-3) This report contains
population and housing unit totals for Census 2000 as well as the 1990
and 1980 censuses. Information on area measurements, population
density, and apportionment counts will be included. This report
will be issued for each state, the District of Columbia, Puerto Rico,
and a national summary volume.
Released on: Internet, paper
Lowest level geography: Places
Sample Data Products:
- Demographic Profile Demographic, social, economic, and housing
characteristics presented in three separate tables.
Released on: Internet, CD-ROM/DVD (w/Summary File 3), paper
Lowest level geography: Census Tracts
- Congressional District Demographic ProfileDemographic, social,
economic, and housing characteristics presented in three separate tables.
Released on: Internet, CD-ROM/DVD (w/Summary File 3), paper
Lowest level geography: Congressional Districts of the 106th Congress
- Summary File 3 (SF 3) SF3 contains tables with social, economic
and housing characteristics compiled from a sample of approximately
19 million housing units (about 1 in 6 households) that received the
Census 2000 long-form questionnaire. Many tables are given for 9 major
race and Hispanic or Latino groups. Ancestry group population
counts are included.
Released on: Internet, CD-ROM/DVD
Lowest level geography: Block Groups
- Summary File 4 (SF 4) Similar to SF3, this file contains tabulations
of population and housing data from sample questions. Tables
in this file will be given for the United States, and a selected list
of detailed race and Hispanic- or Latino-origin groups, American Indian
and Alaska Native tribes and various ancestry groups. Each of the 336
population groups is subject to a population threshold.
Released on: Internet, CD-ROM/DVD
Lowest level geography: Census Tracts
- Public Use Microdata Samples (PUMS) Extracts of raw data from
a small (1-percent or 5-percent) sample of long form census records.
Records are screened to protect confidentiality.One-percent files include
data for the nation and states, as well as substate areas where appropriate.
Five-percent sample have data for state and sub-state areas.
Released on: CD-ROM/DVD
Lowest level geography: Super Public Use Microdata Areas (Super-PUMAs)
of 400,000+ for 1-precent file; PUMAs of 100,000+ for 5-percent
file.
- Advanced Query Function (Sample Data) Allows user specified
tabulations from full microdata file. Includes safeguards against
disclosure of identifying information about individuals and housing
units.
Released on: Internet
Lowest level geography: Census Tracts
- Summary Social, Economic, and Housing Characteristics (PHC-2)
Reports for each state include information from the sample population
and housing subjects.
Released on: Internet, paper
Lowest level geography: Places
- Congressional District Data Summary File 100-percent and sample
data for Congressional Districts of the 108th Congress
Released on: Internet, CD-ROM/DVD
Lowest level geography: Census Tracts within Congressional Districts
Both SF2 and SF4 contain data for race, Hispanic- or Latino-origin groups,
American Indian and Alaska Native tribes. SF4 also contains data for
various ancestry groups. If the population for the group does
not meet a threshold, or minimum number of people, within a geographic area,
the data are suppressed and not shown. If you are looking at several
areas on AFF, and the threshold is not met, a note is displayed. If
you are using the CD-ROMs or DVD-ROMs, the area (e.g. a tract number or
county name) isn’t listed.
Where are the data?
You can access information about the products by viewing the extensive
documentation on the Internet, the CD-ROM or DVD-ROM, and in printed publications.
Each contains a copy of the questionnaire, geographic terms and concepts,
definitions of subject characteristics, data collection and processing
procedures, as well as product-specific information. The data are available
in multiple formats and on several platforms.
Internet. Internet access to the data is through American
FactFinder and the Census 2000 Gateway. There are several,
easy-to-use, options.
- Quick Tables give you a set of key variables for areas down
to the level of census tract.
- Geographic Comparison Tables let you see how your state, city,
county, or metropolitan area stacks up in comparison to others according
to key variables.
- Thematic Maps illustrates the data in a map format.
- Detailed Tables give you access to all the tables released
in each dataset.
Downloading the Data. Every American FactFinder data
page has a download tab on one of the menu bars at the top of the screen
so you can download comma or tab delimited files into spreadsheet or data
base software. In addition, ASCII files for each state are available
on the Internet via File Transfer Protocol (FTP) http://ftp2.census.gov/.
These files are available in ASCII (comma-delimited) format, and do not
come with viewing software.
CD-ROM or DVD. In addition to the FTP site and American
FactFinder, the Summary Files are available on CD-ROM (state by state)
or DVD (all 50 states). Data are generally available in ASCII
format without accompanying software, and there is also a release of the
data that comes with software that facilitates retrieval and manipulation
of the data. Whether downloading information for a single area like a
census tract, or a city or for a group of geographic areas (e.g., all
counties, places, or ZIP Code tabulation areas in the country), the software
simplifies the process and leads you through the steps. These
files are available for purchase or through State Data Centers, Federal
Depository Libraries, and other data providers (see “Census 2000 Products
and Assistance” below).
Geographic Products
The Census Bureau has a number of products available to assist users
in identifying and mapping the census geographic entities. Most
of these map products are available for viewing or FTP on the Web site.
Paper copies of the Census 2000 maps are available for sale through the
Census Bureau’s Customer Services Center at 301-763-INFO (4636). All geographic
products are derived from the TIGER database. TIGER is an acronym
for the Topologically Integrated Geographic Encoding and Referencing System.
It is a geographic database that automates the mapping and related geographic
activities required to support the US Census Bureau’s census and survey
programs.
TIGER/Line®
http://www.census.gov/geo/www/tiger/
UA Census 2000 TIGER/Line® Files
Census 2000 TIGER/Line® Files
Redistricting Census 2000 TIGER/Line® Files
108th CD Census 2000 TIGER/Line® Files
Post 2000 TIGER/Line®
2002 TIGER/Line® Files
Census 2000 Geographic Data Files
http://www.census.gov/geo/www/census2k.html
Census Block Relationship Files
Census Tract Relationship Files
Cartographic Boundary Files
http://www.census.gov/geo/www/cob/
Census 2000 Maps
http://www.census.gov/geo/www/maps/
- American Indian Tribal Census Tract Outline maps
- Census Tract Outline Maps
- Census Block Maps for Places
- Census Block Maps for Counties
- P.L. 94-171 County Block Maps
- PL 94-171 Voting District/State Legislative District Outline Maps
- Public Use Microdata Area Outline maps
- State/County Outline maps
- State/County Subdivision maps
- Urbanized Area Outline maps
- Urban Cluster Outline maps
- ZIP Code Tabulation Area (ZCTA) Outline maps
- 108th Congressional District Atlas
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