United States Census Bureau | An official website of the United States Government

An official website of the United States government

Here’s how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip Header

Partners Researchers Educators Survey Respondents

Explore Census.gov for...

Partners
Researchers
Educators
Survey Respondents

News NAICS Codes Jobs About Us Contact Us Help

Topics

Data & Maps

Surveys & Programs

Resource Library

Search data, events, resources, and more

Helpful Links

QuickFacts U.S. Data Finder Advanced Data Search International Database (IDB) American Community Survey (ACS) Census Records & Genealogy

Helpful Links

QuickFacts U.S. Data Finder Advanced Data Search International Database (IDB) American Community Survey (ACS) Census Records & Genealogy

Topics

Browse our topics and subtopics to find information and data.

View All Topics and Subtopics Index A to Z

Age and Sex Business and Economy Education Emergency Management / Disasters Employment Families and Living Arrangements Geography Health Hispanic Origin Housing

Income and Poverty International Trade Migration/Geographic Mobility Population Population Estimates Public Sector Race Redistricting Research Voting and Registration

Data & Maps

Access demographic, economic and population data from the U.S. Census Bureau. Explore census data with visualizations and view tutorials.

Explore data on data.census.gov View all data resources

Census Academy Combining Data Data Tools and Apps Datasets Developers Experimental Data Products Interactive Maps

Mapping Files Profiles Related Sites Software Tables Training and Workshops Visualizations

Surveys & Programs

Our surveys provide periodic and comprehensive statistics about the nation. This data is critical for government programs, policies, and decision-making.

Survey Help View all Surveys & Programs

Economic Census Household Pulse Survey International Programs Metro and Micro Areas Population Estimates Population Projections Small Area Income and Poverty Statistics of U.S. Businesses Survey of Income and Program Participation (SIPP)

Resource Library

Browse our collection of stories and more.

View all library resources Glossary

America Counts: Stories Audio Blogs By the Numbers Facts for Features Fact Sheets Infographics and Visualizations

Photos Publications Spotlights Stats for Stories Training (Census Academy) Videos Working Papers

Topics

Data & Maps

Surveys & Programs

Resource Library

Partners Researchers Educators Survey Respondents

News NAICS Codes Jobs About Us Contact Us Help

View All Topics and Subtopics Index A to Z

Age and Sex Business and Economy Education Emergency Management / Disasters Employment Families and Living Arrangements Geography Health Hispanic Origin Housing Income and Poverty International Trade Migration/Geographic Mobility Population Population Estimates Public Sector Race Redistricting Research Voting and Registration

Explore data on data.census.gov View all data resources

Census Academy Combining Data Data Tools and Apps Datasets Developers Experimental Data Products Interactive Maps Mapping Files Profiles Related Sites Software Tables Training and Workshops Visualizations

Survey Help View all Surveys & Programs

2020 Census 2026 Census Test 2030 Census American Community Survey (ACS) American Housing Survey (AHS) Annual Business Survey (ABS) Annual Integrated Economic Survey (AIES) County Business Patterns (CBP) Current Population Survey (CPS) Economic Census Household Pulse Survey International Programs Metro and Micro Areas Population Estimates Population Projections Small Area Income and Poverty Statistics of U.S. Businesses Survey of Income and Program Participation (SIPP)

View all library resources Glossary

America Counts: Stories Audio Blogs By the Numbers Facts for Features Fact Sheets Infographics and Visualizations Photos Publications Spotlights Stats for Stories Training (Census Academy) Videos Working Papers

Census.gov /
Our Surveys & Programs /
American Community Survey (ACS) /
Library /
ACS Publications and Working Papers /
ACS Research & Evaluation Program

ACS Research & Evaluation Program

Skip Navigation

Within Publications and Working Papers

ACS Data Briefs
ACS Reports
ACS Research & Evaluation Program
Content Test Evaluation Reports
Internet Data Collection

Within Publications and Working Papers

ACS Data Briefs
ACS Reports
ACS Research & Evaluation Program
Content Test Evaluation Reports
Internet Data Collection

ACS Research & Evaluation Program

The Research and Evaluation program conducts research and evaluation projects, including survey methodology research, important for the improvement of the ACS.

All

2025

2024

2023

2022

2021

2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2001

2025

Select Year

2025

All
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2001

Working Paper

2024 American Community Survey Mailout Timing Test

May 2025

This report discusses the effect of an experiment testing changes to the timing of the mailouts of the ACS Due Date Letter and ACS CAPI Internet Letter.

You May Be Interested In

Contact

Learn how to contact the American Community Survey if you have questions about completing the survey, finding data, or using data.

Updates

Email Updates

Share Your ACS Data Story

Tell us your story about how you use data from the American Community Survey.

Page Last Revised - August 10, 2023

Is this page helpful?
Thumbs Up Image

Yes

NO THANKS

255 characters maximum

255 characters maximum reached

Thank you for your feedback.
Comments or suggestions?

Top

Back to Header

Receive Updates

To sign up for updates please enter your email address.

Enter your email address

Stay Current

America Counts

Director’s Blog

Deputy Director’s Blog

Random Samplings

Research Matters

Stay Connected

Contact

Support

Jobs

Measuring America's People and Economy