According to the latest data released by Immigration and Customs Enforcement (ICE), out of the 34,373 detainees held in detention, 12,083 (or 35%) were arrested by ICE. The rise in total number of ICE-arrested detainees comes even as the overall numbers of detainees nationally has fallen slightly from two weeks ago to 34,373, driven by fewer numbers of CBP arrests that result in detention.

The number of migrants who are electronically monitored by ICE's alternatives to detention (ATD) program remains remarkably steady and currently totals 184,318. Notably, however, the agency's use GPS smartwatches continues to increase, and now reaches a total of 1,441—up from under 1,000 two weeks ago. GPS ankle monitors, which had declined to under 5,000 in June 2023, also continues to increase and now stands at over 20,000 for the first time since May 2022.

Among all of ICE's areas of responsibility (AORs), the number of migrants monitored on ATD in El Paso has jumped most significantly since the end of last fiscal year. While many AORs—such as Miami, San Antonio, and Washington, D.C.—are monitoring fewer migrants than before, the El Paso AOR increased from a total of 2,935 migrants at end of September 2023 to 7,644 in the most recent data. This is much lower than the AOR's with most immigrants monitoring, including San Francisco at 18,630 and Chicago at 17,215, but represents a significant relative increase.

Note TRAC's previous reports that raise concerns about the quality of ICE's public ATD data, specifically related to the accuracy of data on the number of migrants on GPS ankle monitors.

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

• Immigration and Customs Enforcement held 34,373 in ICE detention according to data current as of April 21, 2024.

• 20,852 out of 34,373—or 60.7%—held in ICE detention have no criminal record, according to data current as of April 21, 2024. Many more have only minor offenses, including traffic violations.

• ICE relied on detention facilities in Texas to house the most people during FY 2024, according to data current as of April 15, 2024.

• ICE arrested 7,544 and CBP arrested 14,557 of the 22,101 people booked into detention by ICE during March 2024.

• South Texas Fam Residential Center in Dilley, Texas held the largest number of ICE detainees so far in FY 2024, averaging 1,829 per day (as of April 2024).

• ICE Alternatives to Detention (ATD) programs are currently monitoring 184,318 families and single individuals, according to data current as of April 20, 2024.

• San Francisco's area office has highest number in ICE's Alternatives to Detention (ATD) monitoring programs, according to data current as of April 20, 2024.

For more information, see TRAC's Quick Facts tools here or click here to learn more about TRAC's entire suite of immigration tools.