Immigration law in the United States generally includes the rights and obligations of persons who are not U.S. citizens to temporarily visit or more permanently reside in the U.S.—and for federal and state governments to enforce immigration laws regarding visitors and residents.

Most immigration law consists of federal statutes and regulations—but many state laws impact both legal and illegal immigrants—including employment checks, E-Verify, law enforcement, driver's license requirements, public benefits restrictions, and more.

In Connecticut, as in all states, immigration law is primarily governed by federal statutes and regulations, as the authority to regulate immigration is a federal power. This includes laws pertaining to visas, green cards, asylum, deportation, and citizenship. However, state laws can also impact immigrants in various ways. For example, Connecticut has adopted policies that are considered immigrant-friendly, such as allowing undocumented immigrants to obtain driver's licenses and limiting local law enforcement's cooperation with federal immigration authorities under certain circumstances. The state also participates in the federal E-Verify program, which employers may use to verify the employment eligibility of their workers. Additionally, Connecticut has laws that restrict access to certain public benefits for undocumented immigrants. It's important to note that while state laws can provide additional rights or impose further restrictions, they cannot contradict federal immigration laws.