According to the most recent data release, records show ICE as the arresting agency for 81 percent of initial book-ins from February through mid-May, 2025. Book-ins resulting from CBP arrests have not surpassed 5,000 in a month since January. This may be due to a few factors. First, fewer people are being caught attempting to cross the U.S.-Mexico border between ports of entry. Second, the records might designate ICE as the “arresting authority” for some enforcement events that actually involved both ICE and CBP. Third, the Trump administration has prioritized enforcement on a wider group of people in the U.S. interior. ICE agents have spent considerable time and energy arresting international students, Temporary Protected Status holders, and people with humanitarian parole or pending asylum claims.

While both rhetoric and enforcement attention has shifted from border apprehensions to interior ICE arrests, top-line initial book-ins remain relatively consistent over FY 2025. The most initial book-ins in a single month took place in October 2024, the first month of the fiscal year, when 23,616 individuals were booked in by CBP and ICE under the Biden administration. Since then, initial book-ins have not dropped below 21,000 nor passed 23,000 in a single calendar month, including 22,822 in the month of April 2025.

Early book-in statistics for the month of May suggest an uptick of enforcement. Based on arrests made through the first seventeen days of May, DHS agencies are on pace to make 25,132 initial book-ins by the end of May, a total that would surpass any previous month in FY 2025.

Highlights from data updated in TRAC's Detention Quick Facts tool show that:

• Immigration and Customs Enforcement held 48,870 in ICE detention according to data current as of May 18, 2025.
• 21,041 out of 48,870—or 43.1%—held in ICE detention have no criminal record, according to data current as of May 18, 2025. Many more have only minor offenses, including traffic violations.
• ICE relied on detention facilities in Texas to house the most people during FY 2025, according to data current as of May 12, 2025.
• ICE arrested 18,217 and CBP arrested 4,605 of the 22,822 people booked into detention by ICE during April 2025.
• Adams County Det Center in Natchez, Mississippi held the largest number of ICE detainees so far in FY 2025, averaging 2,171 per day (as of May 2025).
• ICE Alternatives to Detention (ATD) programs are currently monitoring 185,675 families and single individuals, according to data current as of May 17, 2025.
• San Francisco's area office has highest number in ICE's Alternatives to Detention (ATD) monitoring programs, according to data current as of May 17, 2025.

TRAC’s Immigration Quick Facts provides the latest data on immigrant detention, immigration court cases, and immigration prosecutions in federal court. Each page includes several key data points alongside a graphic or table, a short description for context, and a link to more data. Click here to see more about TRAC's entire suite of immigration tools.