Demographic Research

Explore the different race, ethnicity and origin categories used in the U.S. decennial census, from the first one in 1790 to the latest count in 2020.

Test your knowledge of the U.S. census with our 12-question quiz.

In this Q&A and video, learn about the methods and data sources the Center used to estimate the number of unauthorized immigrants in Europe.

Americans overwhelmingly are aware of the upcoming 2020 census, and more than eight-in-ten say they definitely or probably will participate.

Jeffrey S. Passel, senior demographer, on the research techniques used to derive the unauthorized immigrant population estimate in the U.S. and the challenges involved.

A key U.S. fertility rate has reached a record low for the fourth year in a row. But is it really a record low? The short answer: It’s complicated.

Pew Research Center now uses 1996 as the last birth year for Millennials in our work. President Michael Dimock explains why.

Migration, racial or ethnic self-identity, and marriage were among the many topics explored at the Population Association of America’s annual meeting last month.

A new question about citizenship on the 2020 census form is in the headlines, but the U.S. Census Bureau also plans other changes for the next national count.

The U.S. Census Bureau is planning to ask everyone living in the United States whether they are citizens when it conducts its next decennial census in 2020.