U.S. family-based immigration allows U.S. citizens and lawful permanent residents to sponsor qualifying relatives for temporary visas or permanent residence (green cards). These cases often involve statutory quotas, priority dates, and complex affidavit of support requirements.

Immediate relative categories include spouses, unmarried children under 21, and parents of U.S. citizens. These visas are not subject to annual numerical caps and typically offer the most direct pathway to lawful permanent residence. Family preference categories cover additional relatives, including adult children and siblings of U.S. citizens, as well as spouses and children of lawful permanent residents, and are subject to visa backlogs.

Temporary family-related options may include fiancé(e) visas and certain nonimmigrant classifications, which allow entry for a limited purpose but require further filings to obtain permanent residence.

Entrepreneurs and investors may qualify for treaty-based visas such as the E-2 investor visa or, in limited cases, employment-based immigrant visas through investment-backed enterprises. These cases require careful structuring of ownership, capital investment, and operational control.

International students may enter the United States on F-1 or M-1 visas to pursue academic or vocational programs. Students may be eligible for practical training authorization during or after their studies, which can serve as a bridge to longer-term employment-based visa options.

Short-term entry options include B-1 business visitor visas, B-2 tourist visas, and visa waiver travel under the Electronic System for Travel Authorization (ESTA). These classifications allow limited activities and do not permit employment or long-term residence.