CONTENTS
Preface

Introduction
Volume Organization
Understanding the American Community Survey
Some Key Facts About the ACS
New Opportunities
New Challenges
Data Collection versus Data Reporting
The ACS Sample
Geography
Data Comparability
Subjects Covered
Availability of ACS Estimates
Using the ACS
Differences between the ACS and the Decennial Census
Residence Rules
Reference Periods
Period Estimates
Deciding Which ACS Estimate to Use
Margin of Error
Accessing ACS Data Online
More ACS Resources
Background and Overview Information
Accuracy of the Data
ACS Sample Size
ACS Quality Measures
Guidance on Data Products and Using the DataHow to Use the DataComparing ACS Data to Other SourcesWhen to Use 1-year, 3-year, or 5-year EstimatesInformation on Using Different Sources of Data for Income and PovertyPublic Use Microdata Sample (PUMS)Other Data ResourcesPart A — Who: Age, Race Ethnicity, and HouseholdsHighlights
Rankings
Column Headings
Table A-1. States
Table A-2. Counties with Populations of 20,000 or More
Table A-3. Metropolitan Areas
Table A-4. Cities with Populations of 20,000 or MorePart B — What: Education, Employment, and IncomeHighlights
Rankings
Column Headings
Table B-1. States
Table B-2. Counties with Populations of 20,000 or More
Table B-3. Metropolitan Areas
Table B-4. Cities with Populations of 20,000 or MorePart C — Where: Migration, Housing, and TransportationHighlights
Rankings
Column Headings
Table C-1. States
Table C-2. Counties with Populations of 20,000 or More
Table C-3. Metropolitan Areas
Table C-4. Cities with Populations of 20,000 or More

Appendixes
A. Glossary
B. Source Notes and Explanations