- Administrative Dispute Resolution Act (1990)
- Administrative Procedure Act (1946)
- Age Discrimination in Employment Act (1967)
- Agricultural Adjustment Act (1933)
- Aid to Dependent Children (1935)
- Alaska Native Claims Settlement Act (1971)
- Alcoholic and Narcotic Addict Rehabilitation Act (1968)
- Alien and Sedition Acts of 1798
- Americans with Disabilities Act (1990)
- Anti-Drug Abuse Act (1986)
- Anti-Injunction Act (1793)
- Antiquities Act of 1906
- Antiterrorism and Effective Death Penalty Act (1996)
- Arms Control and Disarmament Act (1961) and Amendments
- Atomic Energy Acts
