What’s New
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When bad policies spread: The expansion of the “sex offense registry” model to other convictions
Shaming doesn’t prevent crime.
August 10: Briefings
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Death by incarceration:
Detention duration, overdose, and COVID-19 in Los Angeles County Jails, 2008-2023 by Adrianne Katrina Nelson et al
August 10: Research Library: Jails
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Welcome to our Creator-in-Residence, Marci Marie Simmons!
Marci will work with the Prison Policy Initiative team to create social videos that expose the harms of mass incarceration in America.
August 6: Prison Policy Initiative Blog
Featured report
Does our county really need a bigger jail?
A guide to avoiding unnecessary jail expansion
Our report gives cities and counties a long-needed tool for fighting mass incarceration: a guide to preventing needless jail expansion. With jail populations having tripled in the last three decades, overcrowding in local jails is common — but there are simpler, cheaper, and more just solutions to jail crowding than building a new or bigger jail. We lay out 33 questions, and a list of best practices, to help local decision-makers understand the true costs of — and alternatives to — jail expansion.
Mass incarceration, state by state
Learn about the national prison crisis and how we can begin to turn the tide on mass incarceration. Then, drill down to your state. Be sure to also check out our pages focused on D.C., and the incarceration of Native people.
Select your state:
If our work is new to you, you might want to check out our 2024-2025 annual report.
Recommended Reading:
Advocacy Toolkit
Resources, tips, and best practices to help advocates working to end mass incarceration.
50 state incarceration profiles
All of our recent reports about prison/jail growth, racial disparities, and more, re-organized by state.
Mass Incarceration: The Whole Pie
The U.S. incarcerates nearly 2 million people. Where are they locked up and why? Read our report.
