Redistricting Data (Public Law 94-171) Summary File
- Census 2000 Redistricting Data (Public Law 94-171, or "PL") contains basic
information on the U.S. population in the 2000 Census. It includes data on
people's race and whether they are of Hispanic origin, for both the total
and the adult population. This information is based on answers to the questions
in the Census 2000 Short-Form questionnaire. There are 4 detailed tables
available in the PL Summary File.
Geographies available in PL include: block, tract, county, place and county
subdivision (city or Town), American Indian/Alaska Native/Hawaiian home land area,
Congressional District - for 106th Congress, State Legislative Districts, upper
and lower chambers and state.
About Redistricting Data - Description, geographic coverage, documentation,
table outlines and thematic maps.
Demographic Profile -
There are four tables (DP-1 thru DP-4) in the Demographic Profile.
For Census 2000 data, the DP-1 table is available as part of the
Summary File 1 (SF1) data set, and the other
three tables are available as part of the
Summary File 3 (SF3) data set.
Table DP-1 is tabulated from responses to questions asked of the entire
population (100%); Tables DP-2 through DP-4 are based on questions from
the "long form" which was asked of a sample of the population.
Table DP-1. Profile of General Demographic Characteristics: 2000 contains
counts of population by sex and age, race, Hispanic or Latino and race, type
of household and relationships within households, and housing occupancy and
vacancy figures.
Table DP-2. Profile of Selected Social Characteristics: 2000 includes figures
on school enrollment, educational attainment, marital status, grandparents as
caregivers, veteran status, disability status, residence 5 years ago. Also
included are counts of native and foreign born (both citizens and non-citizens)
persons, region of birth for foreign born persons, language spoken at home, and
counts for 28 ancestry categories.
Table DP-3. Profile of Selected Economic Characteristics: 2000 contains figures
on income, poverty, employment status, occupation, industry, and commuting.
Table DP-4. Profile of Selected Housing Characteristics: 2000 presents housing
data on units in structure, number of rooms, vehicles available, housing heating
fuel, housing value, mortgage status, gross rent, and housing value.
All tables are in PDF format. Tables are available for the United States, all
states, all governmental units within each state, metropolitan statistical
areas, American Indian/Alaska Native/Hawaiian Homeland areas, congressional
districts, the non-metropolitan population of the United States, the metropolitan
population of the United States, and the population with metropolitan areas of
various size classes
Summary File 1 (SF1) 100-Percent Data
- Summary File 1 (SF 1) contains basic information on the U.S. population from
Census 2000. It includes data on people's age, sex, and race, their family and
household groups, and whether their home is owned or rented. This information
is based on answers to the questions on the Census 2000 Short-Form questionnaire.
Data tables are available for the U.S., regions, divisions, states, counties,
county subdivisions, places, census tracts, block groups, blocks, metropolitan areas,
American Indian and Alaska Native areas, tribal subdivisions, Hawaiian home lands,
congressional districts, and ZIP Code Tabulation Areas.
Summary File 1 on DVD media -
The DVD contains data extraction software
and population and housing data based on Census 2000 questions asked of all people
and about every housing unit. There are a total of 286 data tables. The DVD contains
all of the individual State SF1 files in a single database. This database is composed
of approximately 9.2 million geographic summary records with a total of about 30
billion individual data cells. The Census 2000 Data Engine extraction software is a
customized version of SRC's Allocate product. The Census Bureau has prepared a
Tutorial for the DVD.
About Summary File 1
- Description, data content, geographic coverage, documentation, questionnaire, table
outlines, and thematic maps.
Summary File 2 (SF2) 100-Percent Data
- Summary File 2 (SF 2) contains basic information on the U.S. population from
Census 2000. It includes data on people's age, sex, and race, their family and
household groups, and whether their home is owned or rented. This information
is based on answers to the questions on the Census 2000 Short-Form questionnaire.
There are 47 Detailed Tables in SF2.
SF2 focuses on detailed race and ethnicity tables. There are 249 race and ethnicity
groups down to the census tract geographic level.
The SSDC staff has prepared a guide to finding
detailed race tables in American FactFinder.
About Summary File 2 - Description, data content, geographic coverage,
documentation, questionnaire, and table outlines.
Summary File 3 (SF3) Sample Data
- Summary File 3 (SF3) contains some of the richest and most complete statistical
data available on U.S. residents - it is the most popular Census 2000 data product.
Based on questions from the long form questionnaire, these data were collected from
1 in 6 households in the U.S. as part of Census 2000. SF 3 contains data on such
topics as income, ancestry, citizenship status, home values, commute time to work,
occupation, education, veteran status, language ability, migration, place of birth,
and many others.
Summary File 3 presents data for the United States, the 50 states, the District
of Columbia and Puerto Rico in a hierarchical sequence down to the block group
for many tabulations, but only to the census tract levels for others. Summaries
are included for other geographic areas such as Zip Code Tabulation Areas
(ZCTA) and Congressional districts (106th Congress).
About Summary File 3 -
Description, data content, geographic coverage, documentation, questionnaire,
table outlines and thematic maps.
Summary File 4 (SF4) Sample Data
- Summary File 4 (SF4) contains data compiled from a sample of approximately
19 million housing units (about 1 in 6 households) that received the Census
2000 Long-Form questionnaire. It covers topics including income, ancestry,
citizenship status, home values, commute time to work, occupation, education,
veteran status, language ability, migration, place of birth, and many others.
There are 335 Detailed Tables available in the SF 4 data product.
SF4 is focuses on race and ethnicity tables and has 336 Race and Ancestry Groups
down to the census tract level.
The SSDC staff has prepared a guide to finding
detailed race tables in American FactFinder.
About Summary File 4 -
Description, data content, geographic coverage, documentation, questionnaire,
table outlines and thematic maps.
Public Use Microdata Files (PUMS)
- These files contain records for a sample of housing units with information on the
characteristics of each unit and each person in it. While preserving confidentiality
(by removing identifiers), these microdata files permit users with special data needs
to prepare virtually any tabulation. PUMS files have state-level data containing
individual records of the characteristics for 1 percent and 5 percent samples housing units
and people.
Some of the items included on the housing record are: acreage, agricultural sales, allocation
flags, for housing items, bedrooms, condominium fee, contract rent, cost of utilities,
family income in 1999, family, subfamily, and relationship recodes, farm residence, fire,
hazard, and flood insurance, fuels used, gross rent, heating fuel, household income in 1999,
household type, housing unit weight, kitchen facilities, linguistic isolation, meals included
in rent, mobile home costs, mortgage payment, mortgage status, plumbing facilities, presence
and age of own children, presence of subfamilies in household, real estate taxes, rooms,
selected monthly owner costs, size of building (units in structure), state code, telephone
service, tenure, vacancy status, value (of housing unit), vehicles available, year householder
moved into unit, and year structure built.
Some of the items included on the person record are: ability to speak English, age,
allocation flags for population items, ancestry, citizenship, class of worker, disability
status, earnings in 1999, educational attainment, grandparents as caregivers, Hispanic origin,
hours worked, income in 1999 by type, industry, language spoken at home, marital status,
means of transportation to work, migration Public Use Microdata Area (PUMA), migration state,
mobility status, veteran period of service, years of military service, occupation, person's
weight, personal care limitation, place of birth, place of work PUMA, place of work state,
poverty status in 1999, race, relationship, school enrollment and type of school, time of
departure for work, travel time to work, vehicle occupancy, weeks worked in 1999, work
limitation status, work status in 1999, and year of entry.
The Public Use Microdata Sample (PUMS) files contain geographic units known as super-Public
Use Microdata Areas (super-PUMAs) and Public Use Microdata Areas (PUMAs). To maintain the
confidentiality of the PUMS data, minimum population thresholds are set for PUMAs and super-
PUMAs. For the 1-percent state-level files, the super-PUMAs contain a minimum population of
400,000 and are composed of a PUMA or a group of contiguous PUMAs delineated on the 5-
percent state-level PUMS files. Super-PUMAs are a new geographic entity for Census 2000.
The 5-percent state-level files contain PUMAs, each having a minimum population of 100,000,
the 5-percent files also will show corresponding super-PUMAs codes. Each state is separately
identified and may be comprised of one or more super-PUMAs or PUMAs. Large metropolitan areas
may be subdivided into super-PUMAs and PUMAs. PUMAs and super-PUMAs do not cross state lines.
Super-PUMAs and PUMAs also are defined for place of residence on April 1, 1995 and place of work.
Technical Documentation -
Description, data content, and geographic coverage.
Adjusted Census 2000 Data -
The Adjusted Census 2000 numbers are being released pursuant to the order of the
United States Court of Appeals for the Ninth Circuit in Carter v. Department of
Commerce, 307 F.3d 1084. These numbers are not official Census 2000 counts.
These numbers are estimates of the population based on a statistical adjustment
method, utilizing sampling and modeling, applied to the official Census 2000
figures. These estimates utilized the results of the Accuracy and Coverage
Evaluation (A.C.E.), a sample survey intended to measure net over- and
undercounts in the census results. The Census Bureau has determined that the
A.C.E. estimates dramatically overstate the level of undercoverage in Census
2000, and that the adjusted Census 2000 data are, therefore, not better than the
unadjusted data.
These data are similar to the content and organization of the files produced for
the Redistricting Data (P.L. 94-171). There are four data tables each state.
- PL1. RACE
- PL2. HISPANIC OR LATINO, AND NOT HISPANIC OR LATINO BY RACE
- PL3. RACE FOR THE POPULATION 18 YEARS AND OVER
- PL4. HISPANIC OR LATINO, AND NOT HISPANIC OR LATINO BY RACE FOR THE
POPULATION 18 YEARS AND OVER
There are 3 separate files for each state. File 1 contains tables 1 and 2; File 2
contains tables 3 and 4; and File 3 contains the geographic detail. The data are
supplied for all states and all levels of geography. The state files are compressed.
The files must be uncompressed in order to use them for analysis and statistical purposes.
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Adjusted Data Tables: These files are for social science researchers to use in
conjunction with statistical and database software. Associated files may include documentation,
notes, papers, etc.
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Adjusted State Tables (zip)
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Technical Documentation (PDF)
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American Community Survey
- The American Community Survey (ACS) is a way to provide the data communities need every
year instead of once in ten years. It is an on-going survey that the Census Bureau
plans will replace the long form in the 2010 Census. The Census 2000 Supplementary
Survey (CSS) was a Decennial Census program designed to demonstrate the feasibility of
collecting long form type information at the same time as, but separate from,
the Decennial Census.
More information about these surveys and data tables is available from the Census
Bureau.
American FactFinder
(works best with Internet Explorer)
- An electronic system for access and dissemination of Census Bureau data on the internet.
The system offers prepackaged data products and user-selected data tables and maps from
Census 2000, the 1990 Census of Population and Housing, the 1997 Economic Census, and the
American Community Survey.
SSDC Data Tables -
These Excel spreadsheets were prepared by the
SSDC staff at the University of California, San Diego.
We used the California state ASCII data files from the Census 2000 Redistricting
Data (PL94-171) and the Census 2000 Demographic Profiles (SF1). These data were
imported into Access and the query results were exported into Excel.
Although you can duplicate some of these tables in American FactFinder, smaller
geographic areas (places, tracts, blocks) cannot be duplicated because of record
limitations in American FactFinder. In some cases, place names for census place
codes within San Diego county were derived from the
FIPS 55 Database.
Population Estimates -
The 2002 population estimates start with a base population for April 1, 2000
and calculate population for July 1, 2000, July 1, 2001, and July 1, 2002 using
data for births, deaths, and migration.
California State Data Centers - Data Centers publish reports/files and
provide access to tables. These files and reports are available in Excel or PDF
formats. The SANDAG Data WareHouse contains hundreds of historic, current, and forecast
economic and demographic variables for geographic areas (census tracts, major
statistical areas, subregional areas, cities, the unincorporated area, and the
city of San Diego and County of San Diego community planning areas) in the San
Diego region. Users may select multiple variables for one or more geographic
areas and download the information as a table, a text file, or directly into a
spreadsheet.
Geography and Map Products - Census 2000 maps are available in
PDF format. Information about
PRINTING FROM THE PDF MAP FILES is available
from the Census Bureau. Maps show county, place, legislative district, voting district,
census tract, and block boundaries. If maps are not available from one of these
links, they can usually be generated from the American FactFinder. This section
also includes links to general information about census geography, changes in
2000, criteria for census geographical areas, and redistricting maps.
Related Links:
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News and Information:
- 4 Easy Steps to Census 2000 Data on American FactFinder
- Census 2000 FAQ
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Census 2000 Subject Specialists
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Census Bureau Census History
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Census Bureau Historical Forms and Questions, 1790-1970
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Census Bureau News Releases
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Federal Legislative and Program Uses for Census Questions
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GITCO Census 2000 Toolbox
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Introduction to Census 2000 Data Products
- Measuring America: The Decennial Censuses From 1790 to 2000 (questionnaires and instructions)
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Other Sources of Statistical Data and Maps:
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Census 2000 Analytical Briefs (analysis of data)
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Census 2000 Housing Units
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Census 2000 Rankings, Comparisons, and Summaries
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Census 2000 State and County Quick Facts
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Census A-Z Subjects Index
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Census Bureau Demographic Surveys
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Census Bureau Housing Topics
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Census Bureau Minority Links
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Census Bureau Population and Household Economic Topics
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CIESIN Thematic Mapping, 1990 (Plans for 2000 mapping are unknown)
- Fedstats
- IPUMS USA
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MABLE/Geocorr Geographic Correspondence Engine
(Generates files and/or reports showing the relationships between
a wide variety of geographic coverages for the United States. It can,
for example, tell you with which county or counties each ZIP code in the state of
California shares population. May be updated to include Census 2000 geography.)
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ProximityOne (software for ASCII data conversion, data map integration,
and shape file sets by state)
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State of the Cities Data Systems, 1970-2000
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United States Decennial Censuses General Research Guide
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United States Historical Census Data Browser
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University of Michigan Census 2000 Products
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Race:
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Census Race FAQ
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Historical Census Statistics on Population Totals By Race, 1790 to 1990, and By Hispanic
Origin, 1970 to 1990, For The United States, Regions, Divisions, and States
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OMB web site (Provides the most authoritative information on the
collection, aggregation and use of race data. Go to the section on "Data on
Race and Ethnicity")
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Overview of Race and Hispanic Origin
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Revisions to the Standards for the Classification of Federal Data on Race
and Ethnicity
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Tutorials and Training:
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American FactFinder Tutorial
(Grace York, University of Michigan)
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American FactFinder and Census 2000
(Grace York, University of Michigan)
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Census 2000 SF1 DVD Tutorial
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Census Bureau Public Use Training Modules
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Census Tutorial (Daniel Cornwall, Alaska State Library)
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Public Use Presentation Library - (View or download 20+ Powerpoint
presentations)
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SRC Software for 2000 Census Data Summary File 1 DVD
(Data retrieval - Grace York, University of Michigan)
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