Undocumented immigrants are individuals who enter or reside in a country without legal permission. They may have crossed borders without proper documentation or overstayed a visa. This group often seeks better economic opportunities, safety, or family reunification. In many countries, including the United States, undocumented immigrants face challenges such as limited access to healthcare, education, and legal employment. Their status can lead to fear of deportation and difficulties in integrating into society, despite their contributions to the economy and community.