Is all of Maine within U.S. Customs and Border Protection’s jurisdiction?

All of Maine falls under the jurisdiction of U.S. Customs and Border Protection, because the entire state lies within 100 miles of the Canadian border, the Atlantic Ocean or both. 

Within the “100-mile zone,” CBP agents and Border Patrol officers have heightened authority, though they still have a more limited ability to make arrests and enforce immigration law outside the zone.

CBP, which was established to prevent unlawful entries, is distinct from U.S. Immigration and Customs Enforcement, or ICE, which is tasked with immigration enforcement more broadly, though the two agencies have similar duties, often work together and are both part of the U.S. Department of Homeland Security.

In Maine, Border Patrol agents said they had already apprehended more people in the country illegally by May of this year than in all of 2024, while ICE arrests have increased 40% year-over-year, according to the Deportation Data Project.