United States Census Bureau | An official website of the United States Government
Geography and the
American Community
Survey: What Data Users
Need to Know
February 2020
Geography plays an important role in
all U.S. Census Bureau activities by
providing the framework used to
collect and publish data, including
American Community Survey
(ACS) estimates. Data users employ
ACS data that are tabulated for a
variety of geographic areas
to produce detailed portraits and
maps of social, economic, housing,
and demographic characteristics of
America’s communities.
This guide provides an overview of
geographic areas for which ACS data
are available, special considerations
in working with spatial data,
and links to tools and other
resources that data users can use to
map ACS data.
Download by Section
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Geogra
phy and
the
Americ
an
Commu
nity
Survey
What
Data
Users
Need to
Know
[6.1
MB]
America
n
Commun
ity
Survey
1. Geographic Areas Covered in the ACS [2.1
MB]
[/content/dam/Census/library/publications/2020/acs/acs_geography_handbook_2020_ch01.
pdf]
American Community Survey
2. Geographic Boundaries, Vintages, and Frequency of
Updates [<1.0 MB]
[/content/dam/Census/library/publications/2020/acs/acs_geography_handbook
_2020_ch02.pdf]
American Community Survey
3. Accessing and Mapping ACS Data [1.4
MB]
American Community Survey
[/content/dam/Census/library/publications/2020/acs/acs_geography_handbook_2020_ch03.pd
f]
4. Additional Resources [<1.0 MB]
[/content/dam/Census/library/publications/2020/acs/acs_geography_handbook_2020_ch04.pdf]
American Community Survey
Others in Series
Publication
What Researchers Need to Know
April 2020
This handbook helps researchers learn more about estimates
for geographic areas, how to access data products, sampling
error, and more.
[/programs-surveys/acs/library/handbooks/researchers.html]
Publication
What State and Local Government
Users Need to Know
August 2020
This handbook helps data users from state and local
governments learn about ACS data and provides examples of
how ACS data can answer real-world questions.
[/programs-surveys/acs/guidance/handbooks/state-local.html]
Publication
What ACS Public Use Microdata
Sample File Users Need to Know
February 2021
This guide helps data users learn how to access PUMS files,
create PUMS tables, and measure accuracy and margins of
error.
[/programs-surveys/acs/guidance/handbooks/pums.html]
VIEW ALL [/PROGRAMS-SURVEYS/ACS/LIBRARY/HANDBOOKS.HTML]
Related Information
Geography & ACS [/programs-surveys/acs/geography-acs.html]
Census Geographies [/geographies.html]
WEBINAR
Geography Areas and Concepts for the American Community Survey [/data/academy/webinars/2022/geography-areas-and-
concepts-for-the-acs.html]
Page Last Revised - May 1, 2025