Title: Illegal immigration to the United States
Content:  According to the U.S. Department of Homeland Security, the countries of origin for the largest numbers of illegal immigrants are as follows (latest of 2017): According to the Migration Policy Institute, Mexicans represented 53% of the illegal immigrant population. The next largest percentages were from Asia (16%), El Salvador (6%), and Guatemala (5%). The Urban Institute also estimates "between 65,000 and 75,000 Canadians currently live illegally in the United States."
Title: Illegal immigration to the United States
Content:  In general, illegal immigrants from Mexico and Central America come to the USA as they flee from insecurity and violence in their own country (i.e. forced recruitment in gangs). or in search for better economic opportunities. However, it sometimes also occurs due to political oppression. From Asia, they come for economic reasons but some come involuntarily as sex slaves or indentured servants. From Sub-Saharan Africa, the majority come for economic activities. From Eastern Europe, they primarily come for economic activities and to rejoin family already in the United States. Like other regions, there are also some who come involuntarily as part of the sex industry.
Title: Illegal immigration to the United States
Content:  , the following data table shows a spread of distribution of locations where illegal immigrants reside by state.
Title: Illegal immigration to the United States
Content:  total U.S. population. Estimates in 2016 put the number of unauthorized immigrants at 10.7 million, representing 3.3% of the total U.S. population. Since the Great Recession, more illegal immigrants have left the United States than entered it, and illegal border crossings are at the lowest in decades. Since 2007, visa overstays have accounted for a larger share of the growth in the illegal immigrant population than illegal border crossings, which have declined considerably from 2000 to 2018. In 2012, 52% of unauthorized immigrants were from Mexico, 15% from Central America, 12% from Asia, 6% from South America, 5% from the Caribbean, and another 5% from Europe and Canada. As of 2016, approximately two-thirds of unauthorized adult immigrants had lived in the U.S. for at least a decade.
Title: Foreign relations of Mexico
Content:  Almost a third of all immigrants in the U.S. were born in Mexico, being the source of the greatest number of both authorized (20%) and unauthorized (56%) migrants who come to the U.S. every year. Since the early 1990s, Mexican immigrants are no longer concentrated in California, the Southwest, and Illinois, but have been coming to new gateway states, including New York, North Carolina, Georgia, Nevada, and Washington, D.C., in increasing numbers. This phenomenon can be mainly attributed to poverty in Mexico, the growing demand for unskilled labor in the U.S., the existence of established family and community networks that allow migrants to arrive in the U.S. 
Title: Education of immigrants in the United States
Content:  to 4.7% and now has spiked to 13% in 2010. What makes the difference today is the demographic immigrating to the US. In the early 20th century, that influx of immigrants came from Southern and Eastern Europe which was closer in cultural resemblance to the developed American culture of the time as well as their labor skills being almost universal in the early factory setting. Today, "53% of immigrants are from Mexico, Central America, the Caribbean, or South America; further, about 59% of the illegal immigrant population in the United States in 2011 is from Mexico, with another 14% from El Salvador, Guatemala, 
Title: Illegal immigration
Content:   Approximately 11 million illegal immigrants were estimated to be living in the United States in 2006. The Pew Hispanic Center estimated that this peaked at 12 million in March 2007 and declined to 11 million again in March 2009. The majority of the illegal immigrants are from Mexico. The issue of illegal immigration has long been controversial in the United States. In 2007, President George W. Bush called for Congress to endorse his guest worker proposal, stating that illegal immigrants took jobs that Americans would not take. The Pew Hispanic Center notes that while the number of legal immigrants arriving has not varied substantially since the 1980s, the number of illegal immigrants has increased dramatically and, since the mid-1990s, has 
Title: Puerto Rico
Content:  As of 2019, Puerto Rico was home to 100,000 permanent legal residents. The vast majority of recent immigrants, both legal and illegal, come from the Dominican Republic and Haiti. Other major sources of recent immigrants include Cuba, Mexico, Colombia, Panama, Jamaica, Venezuela, Spain, and Nigeria. Additionally, there are many non-Puerto Rican U.S. citizens settling in Puerto Rico from the mainland United States and the U.S. Virgin Islands, as well as Nuyoricans and other stateside Puerto Ricans coming back. Most recent immigrants settle in and around San Juan. Emigration is a major part of contemporary Puerto Rican history. Starting soon after World War II, poverty, cheap airfares, and promotion by the island government caused waves of Puerto Ricans to move to the United States mainland, particularly to the northeastern states and nearby Florida. This trend continued even as Puerto Rico's economy improved and its birth rate declined. Puerto Ricans continue 
Title: Illegal immigration to the United States
Content:  In 2017, illegal border crossing arrests hit a 46-year low, and were down 25% from the previous year. NPR stated that immigrants may be less likely to attempt to enter the U.S. illegally because of President Trump's stance on illegal immigration. The majority of illegal immigrants come from Mexico. Studies have shown that 40 million foreign born residents live in the U.S. 11.7 million of that population is illegal. During the 1950s, there were 45,000 documented immigrants from Central America. In the 1960s, this number more than doubled to 100,000. In the decade after, it increased to 134,000. In 2019, after being threatened with punitive tariffs, Mexico agreed to a deal with the U.S. to better stem the flow of migrants passing through the country to enter the U.S. In September 2019, Mexican foreign minister Marcelo Ebrard stated that immigration to the U.S. through Mexico has decreased significantly, and that this trend is "irreversible. ... It is something that we think will be permanent.”
Title: Immigration to the United States
Content:  The illegal immigrant population of the United States is estimated to be between 11 and 12 million. The population of unauthorized immigrants peaked in 2007 and has declined since that time. The majority of the U.S. unauthorized immigrants are from Mexico, but "their numbers (and share of the total) have been declining" and as of 2016 Mexicans no longer make up a clear majority of unauthorized immigrants, as they did in the past. Unauthorized immigrants made up about 5% of the total U.S. civilian labor force in 2014. By the 2010s, an increasing share of U.S. unauthorized immigrants were long-term residents; in 2015, 66% of adult unauthorized residents had lived in the country for at least ten years, 

Question: where do most illegal immigrants in the us come from?
Answer: Mexico.