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 Colorado, 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, Colorado has implemented the use of E-Verify for certain public and private employers to confirm the eligibility of their employees to work in the United States. Law enforcement in Colorado may also cooperate with federal immigration authorities to a certain extent, although policies can vary by jurisdiction. Additionally, Colorado allows residents without lawful immigration status to obtain driver's licenses under the Colorado Road and Community Safety Act. The state also has restrictions on public benefits for undocumented immigrants, but some benefits may be available to those with lawful presence or certain immigration statuses. It's important to note that state laws and policies can change, and they may also be subject to legal challenges that affect their implementation and enforcement.