Immigration reform is change to the current immigration policy of a country. In its strict definition, reform means "to change into an improved form or condition, by amending or removing faults or abuses". In the political sense, "immigration reform" may include promoted, expanded, or open immigration, as well as reduced or eliminated immigration.
The United Kingdom's decision to leave the European Union was in part driven by significant portions of the electorate having grievances about immigration law and the free movement of peoples into the UK.
| Rank | Country | Program | Years | Approximate beneficiaries | Notes | Reference |
|---|---|---|---|---|---|---|
| 1 | Immigration Reform and Control Act (IRCA) | 1986–1989 | 2,700,000 | USCIS data. | ||
| 2 | Temporary Protection Statute (ETPV/PPT) | 2021–present | 2,000,000–2,300,000 | UNHCR data. | ||
| 3 | Venezuelan Admission, PTP/CPP Regularization and Humanitarian Protection | 2017–2024 | 1,600,000–1,800,000 | UNICEF and Peruvian government data. | ||
| 4 | 2026 Regularization Program | 2026 | 1,000,000–1,200,000 | Migration Policy Institute. | ||
| 5 | Deferred Action for Childhood Arrivals (DACA) | 2012–present | 835,000+ | USCIS data. | ||
| 6 | Humanitarian Response for Venezuelan Children | 2018–present | 603,494 | UNICEF data. | ||
| 7 | Bossi–Fini Regularization | 2002 | 650,000 | European Commission data. | ||
| 8 | Spanish Regularization Program | 2005 | 578,375 | Migration Policy Institute. | ||
| 9 | Plan Patria Grande | 2006–2010 | 420,000+ | Argentine government data. | ||
| 10 | National Regularization Programs | 1998–2001 | 370,000 | IOM data. | ||
| 11 | Extraordinary Regularization Programs | 1992–2004 | 180,000+ | IOM data. |