The number of Americans pursuing Irish citizenship through ancestry climbed 63 percent in 2025, reaching 18,910 applications to Ireland's Foreign Births Register, the highest since digital records began in 2013.

This pathway allows eligible U.S. citizens with an Irish-born parent or grandparent to register their birth abroad and gain Irish citizenship, which includes an EU passport granting freedom of movement across the bloc. The Irish Department of Foreign Affairs processed 40,250 such certificates in 2025, nearly matching the 42,808 applications received the prior year.

Immigration experts attributed the increase to growing unease with the Trump administration's policies on immigration, tariffs, and transgender rights. Carol Sinnott of Sinnott Solicitors noted that many U.S. clients view an Irish passport as a 'plan B' in a 'safer and less hostile society,' with the administration's stance on transgender issues serving as a particular catalyst due to perceived discrimination. Ono Okeregha of the Immigration Advice Service pointed to tariff hikes, stricter immigration rhetoric, and increased deportations by Immigration and Customs Enforcement as additional drivers.

While the surge drew attention, the absolute figures remain modest relative to the roughly 32 million Americans claiming Irish ancestry, according to U.S. Census Bureau data. Applications represent individual contingency planning rather than a mass exodus, with only about 9,600 Americans relocating to Ireland in the year ending April 2025, nearly double the previous year's 4,900 but still a small fraction of bilateral migration flows.

Separate U.S. passport applications to Ireland totaled 31,825 in 2024, up nearly 10 percent from the year before. Applications for British citizenship from Americans rose 42 percent to 8,790 in 2025, reflecting a broader interest in European options.

Processing times for Foreign Births Register applications average 12 months, with most succeeding upon submission of required documents proving lineage. The trend echoes past spikes, such as after Brexit and during Trump's first term, when Americans with European roots sought second passports for mobility and security.

Ireland's appeal stems from its strong U.S. diaspora ties, EU membership, and business-friendly environment. Migration researchers at Maynooth University cautioned that surging passport demand may not lead to proportional actual moves to Ireland.