Civil, Not Criminal
Detainees are held under civil immigration authority rather than criminal charges, which means the legal protections and oversight rules differ from those in the criminal justice system.
In plain English
Where immigration cases mean lockup.
A place where the federal government holds people who are going through immigration cases or facing deportation. Many are run by private companies or local jails under contract with ICE.
Simple example
In fiscal year 2024, ICE held an average of about 37,000 people per day across roughly 130 detention facilities nationwide, ranging from dedicated federal centers to county jails with ICE contracts.
Why it matters
What the term actually changes.
Health And Safety
Conditions inside these facilities — including medical care, staffing, and oversight — directly affect the well-being of tens of thousands of people in federal custody at any given time.
Public Cost
Taxpayers fund detention operations through congressional appropriations, so facility standards and contracts shape both federal spending and private contractor revenue.
How it works
The mechanics, in practice.
Mixed Operators
ICE contracts with private prison companies, county sheriffs, and other entities to run most facilities, while a smaller number are directly operated by the federal government.
Detention Standards
Facilities are generally required to follow ICE's Performance-Based National Detention Standards, which cover medical care, food, safety, and access to legal counsel.
Internal Oversight
Compliance is monitored largely within the Department of Homeland Security through inspections and the DHS Office of Inspector General, rather than through standards enforceable by detainees in court.
Related guide
How is medical care regulated in ICE detention facilities?
A look at the rules, oversight gaps, and policy debate behind health care for people in U.S. immigration custody.
Read the guide → Related issue brief
Should Congress set enforceable medical-care standards for ICE detention facilities?
Lawmakers are weighing whether to write binding medical-care rules for immigration detention into federal law, replacing agency-administered guidelines.
Read the brief →You’ve learned the term. Now vote.
Should Congress set enforceable medical-care standards for ICE detention facilities?
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