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Issues

Learn about our key areas of focus to end mass incarceration and promote racial justice.
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Racial Justice

Ending mass incarceration must include combating racial inequality and disparity.

Sentencing Reform

It's time to take a second look at extreme sentences.

Voting Rights

The criminal justice system shouldn't have a say in our democracy.

Youth Justice

We must end youth incarceration and provide all youth with the support they need to thrive.
Featured Campaign

Second Look Network

Ending mass incarceration requires taking a second look at extreme sentences. Learn more about our coalition of legal professionals providing direct representation to incarcerated individuals seeking relief from lengthy or unfair sentences.
Advocacy

The Sentencing Project is a leading voice for criminal legal reform.
Advocacy overview
Our Work

Explore our work at the national, state, and local level to promote a fair and effective criminal legal system.

Second Look Network

The Network serves, connects, and empowers legal advocates across the country to bring people serving excessive and unfair prison sentences home.

Get Involved

Changing laws and policies to end mass incarceration require a mass movement. Here are ways you can take action.
Featured Campaign

50 Years and a Wake Up

This year marks the 50th year since the U.S. prison population began its unprecedented surge. Partner with us to end mass incarceration!
Research

Explore our publications, fact sheets, data & more.
Overview
Growth in Mass Incarceration

The United States is the world’s leader in incarceration. Get the facts and statistics on trends in U.S. incarceration.

U.S. Criminal Justice Data

View state-level data to provide a snapshot of key indicators of mass incarceration's impact in the United States

Detailed Data Tool

Compare state-level incarceration data for youth and adults with this expanded data set

Resource Library

Search important resources published by The Sentencing Project, including research publications, advocacy briefs, webinars, and more
Featured Publication

One in Five

One in five Black men born in 2001 is likely to experience imprisonment within their lifetime. Our four-part “One in Five” series examines racial inequities in America’s criminal legal system, as well as highlights promising reforms.
- Glossary of Criminal Justice Terms

Ashley Nellis, Ph.D.

Co-Director of Research

Ashley Nellis, Ph.D. is a nationally recognized expert in the study of life sentences and long-term imprisonment. Her recent research examines the prevalence of life imprisonment, emerging adults sentenced to life, elderly persons with life sentences, and the low recidivism rates among those released from long-term imprisonment.

She is the coauthor with Marc Mauer of The Meaning of Life: The Case for Abolishing Life Sentences (The New Press, 2018) which has received praise from the Los Angeles Review of Books, Kirkus, and Publishers Weekly, and has been featured on National Public Radio. Her research is cited widely because of its unique contribution to the field of criminology. Dr. Nellis is also the author of A Return to Justice: Rethinking our Approach to Juveniles in the System (Rowman & Littlefield, 2015) which chronicles America’s historical treatment of youth in the justice system and presses for a reorientation of juvenile justice practices toward the original vision. Her 2012 national survey of young people sentenced to life without parole has led to a greater understanding of reduced culpability for juveniles who commit serious crime. Her work has appeared in many scholarly journals and law reviews, she regularly appears in the media, and she presents regularly before numerous professional and academic audiences. Her published research is available at Google Scholar.