This guide is under construction. Please reach out if you have questions about Census data or recommendations for the guide.

Welcome!

Thank you for using the UWM Libraries' Guide on US Census and American Community Survey. This guide provides critical information about demographic analysis using the information from the United States Decennial Census and related products such as the American Community Survey and how they are used for scholarly research.

The guide focuses on the following learning objectives:

• Understand the purpose and mandate of the US Census
• Identify topics where census data would be an appropriate resource for scholarly research
• Compare and contrast the US Decennial Census* and the American Community Survey
• Summarize social issues around the collection and dissemination of demographic data
• Outline common methods for analysis, visualization, and knowledge production using demographic data
• Use tools from the US Census Bureau and elsewhere to access data for your research

*The US Census Bureau performs other censuses including the Economic Census and the Census of Governments that are beyond the scope of this guide.

How to use this guide:

Please explore by reading the boxes and clicking on the colorful buttons of the guide. This guide also highlights key words and phrases using special formatting redirecting readers to the official glossary definitions, mainly of Census.gov or archives.com Please hover over the formatted text to access the definitions.

The American Community Survey

The American Community Survey (ACS) is an ongoing survey that provides vital information on a yearly basis. Information from the survey generates data that help determine how more than $675 billion in federal and state funds are distributed each year. [source]

Every year, the Census Bureau contacts over 3.5 million households across the country to participate in the ACS using a random sample of addresses. The information is used by government agencies, nongovernmental organizations, planners, tribal governments and organizations, businesses, researchers, journalists, and the public. [source]

Those already familiar with the US Census may recall that during the 20th century the questions were divided between a short form and a long form, where the short form asked basic questions about age, sex, race, and key housing questions. The long form asked more detailed questions but was only required of a subset of households. The 2010 decennial census used only the short form and the long form was replaced by the ACS. [source]

Many researchers use a combination of information from the Census and the ACS. It's important to be able to distinguish between the two different types of data.