In 2022, about **** million illegal aliens were apprehended in the United States. This was a significant increase from the previous year, when there were around **** million illegal aliens apprehended nationwide. Apprehensions refer to Border Patrol apprehensions and ICE administrative arrests.

The estimated population of unauthorized immigrants in the U.S. stands at around ** million people. Although the number has stabilized, the United States has seen a spike in migrant encounters in the last few years, with over * million cases registered by the U.S. Border Patrol in 2023. This is a slight decrease from the previous year, when there were over *** million cases registered. Due to its proximity and shared border, Mexico remains the leading country of origin for most undocumented immigrants in the U.S., with California and Texas being home to the majority.

Immigration and political division

Despite the majority of the population having immigrant roots, the topic of immigration in the U.S. remains one of the country’s longest-standing political debates. Support among Republicans for restrictive immigration has grown alongside Democratic support for open immigration. This growing divide has deepened the polarization between the two major political parties, stifling constructive dialogue and impeding meaningful reform efforts and as a result, has led to dissatisfaction from all sides. In addition to general immigration policy, feelings toward illegal immigration in the U.S. also vary widely. For some, it's seen as a significant threat to national security, cultural identity, and economic stability. This perspective often aligns with support for stringent measures like Trump's proposed border wall and increased enforcement efforts. On the other hand, there are those who are more sympathetic toward undocumented immigrants, as demonstrated by support for the Deferred Action for Childhood Arrivals (DACA) program.

In January 2022, it was estimated that about 1.85 million male illegal immigrants living in the United States were aged between 35 and 44 years old. In that same year, it was estimated that 1.52 million female illegal immigrants living in the U.S. were between 35 and 44 years old.

In 2022, an estimated 10.99 million unauthorized immigrants were living in the United States. This is an increase from about 3.5 million unauthorized immigrants who lived in the United States in 1990.

In 2022, the greatest number of illegal aliens returned in the United States were from the Philippines, with 39,891 illegal aliens returned. India, Canada, China, and Russia rounded out the top five in that year.

This study was conducted to examine whether a rising crime rate in El Paso, Texas and San Diego, California in 1986 could be attributed to, among other factors, the influx of undocumented aliens. Variables include level of involvement of undocumented aliens in serious felony arrests in San Diego and El Paso Counties, the outcome of serious felony arrest cases involving undocumented persons compared to others arrested for similar offenses, the impact of arrests of undocumented aliens on the criminal justice system in terms of workload and cost, the extent that criminal justice agencies coordinate their efforts to apprehend and process undocumented aliens who have committed serious crimes in San Diego and El Paso counties, and how differences in agency objectives impede or enhance coordination. Data are also provided on how many undocumented persons were arrested/convicted for repeat offense in these counties and which type of policies or procedures could be implemented in criminal justice agencies to address the issue of crimes committed by undocumented aliens. Data were collected in the two cities with focus on serious felony offenses. The collection includes sociodemographic characteristics, citizenship status, current arrest, case disposition, and prior criminal history with additional data from San Diego to compute the costs involving undocumented aliens.

From January to June 2025, the highest number of illegal immigrants that arrived in Spain via land and sea came from Mali, with approximately ***** people. The immigrants from Senegal and Algeria were the second and third most numerous group, with ***** and ***** people leaving their country of residence, respectively. More than ****** illegal immigrants reached the Iberian country in 2024. A risky journey Spain, together with Italy and Greece, are the main points of entry to Europe for illegal migration. Most arrivals happen through the Mediterranean Sea, which is a very dangerous journey for migrants. While active since 2006, the migration route from the coasts of West Africa to the Canary Islands (the closest territory of the European Union) has become particularly popular in recent years, even though so many people lost their lives their. Undocumented minors Among those reaching the Spanish territory are undocumented and unaccompanied minors, known in Spanish as "menas” (Menores Extranjeros No Acompañados). In 2018, the number of unaccompanied and separated children that arrived by sea exceeded *****, which represented the largest figure since at least 2014. This number decreased by approximately ***** cases in 2020. Nearly half of them came from Morocco, separated from Spain by merely ** kilometres of water at the Gibraltar Strait's narrowest point.

Total Illegal Alien Apprehensions By Month From FY 1999 through FY 2014

In 2019, California had the highest population of unauthorized immigrants, at around 2.74 million. The overall figure for the United States was estimated to be around 11.05 million unauthorized immigrants.

The provided data includes: year, tonnage, fisheries products, agricultural products, tobacco, alcohol, drugs, firearms, smuggling, others, subtotal, cancellations, fines, and other field data.

As of January 2022, it was estimated that about 4.81 million illegal immigrants from Mexico were living in the United States. It was also estimated that 750,000 illegal immigrants from Guatemala were living in the United States.

Thailand Number of Aliens Work Permit: Illegal Immigrant data was reported at 66,483.000 Unit in Oct 2018. This records an increase from the previous number of 65,125.000 Unit for Sep 2018. Thailand Number of Aliens Work Permit: Illegal Immigrant data is updated monthly, averaging 25,261.000 Unit from Jan 1994 (Median) to Oct 2018, with 298 observations. The data reached an all-time high of 206,014.000 Unit in Nov 1997 and a record low of 4,557.000 Unit in Nov 1996. Thailand Number of Aliens Work Permit: Illegal Immigrant data remains active status in CEIC and is reported by Office of Foreign Workers Administration (Work Permit). The data is categorized under Global Database’s Thailand – Table TH.G007: No of Aliens Work Permit.

Graph and download economic data for Employment Level - Foreign Born (LNU02073395) from Jan 2007 to May 2025 about foreign, household survey, employment, and USA.

Transatlantic Trends: Immigration, 2010 examined attitudes and policy preferences related to immigration in Europe, Canada, and the United States. The survey concentrated on the most important issues facing the respondent's country, general perceptions of immigration and immigrants, perceptions of legal and illegal immigrants, the impact of immigration on society, conditions for citizenship, policies on legal and illegal immigration, access to social benefits, government evaluation, decision-making level, socio-political rights, consequences of an aging society, immigration and integration, economic evaluation, vote intention, and political party identification. Demographic and other background information includes gender, age, age when stopped full-time education and stage at which full-time education was completed, religious affiliation, ethnicity, citizenship, origin of birth (personal and parental), type of locality, region of residence, and language of interview.