| Nolan Act (Patents) |
| Nolan Minimum Wage Law (District of Columbia) |
| Nonappropriated Fund Instrumentalities Employees' Retirement Credit Act of 1986 |
| Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 |
| Non-Intercourse Act (Foreign Relations) |
| Nonprofit Institutions Act |
| Nonsale Disposals Act of 1878 |
| Nontraditional Employment for Women Act |
| Non-Vessel-Operating Common Carrier Act of 1991 |
| Non-Vessel-Operating Common Carrier Amendments of 1990 |
| Norris Act (Conveyances by Union Pacific Ry. Co.) |
| Norris-La Guardia Act (Labor Disputes) |
| Norris Muscle Shoals Act |
| Norris-Rayburn Rural Electrification Act |
| North American Free Trade Agreement Implementation Act |
| North American Wetlands Conservation Act |
| North American Wetlands Conservation Act Amendments of 1994 |
| North Atlantic Treaty Organization Mutual Support Act of 1979 |
| North Carolina Wilderness Act of 1984 |
| North Pacific Anadromous Stocks Act of 1992 |
| North Pacific Anadromous Stocks Convention Act of 1992 |
| North Pacific Fisheries Act of 1954 |
| North/South Center Act of 1991 |
| Northeast Rail Service Act of 1981 |
| Northern Cheyenne Indian Reserved Water Rights Settlement Act of 1992 |
| Northern Great Plains Rural Development Act |
| Northern Pacific Adjustment Acts |
| Northern Pacific Halibut Act |
| Northern Pacific Halibut Act of 1937 |
| Northern Pacific Halibut Act of 1982 |
| Northwest Atlantic Fisheries Act of 1950 |
| Northwest Atlantic Fisheries Convention Act of 1995 |
| Northwest Power Act |
| Northwest Territory Ordinance of 1787 |
| Notaries Public Expense Act of 1955 |
| Notice to Lessees Numbered 5 Gas Royalty Act of 1987 |
| Nuclear Career Incentive Act of 1975 |
| Nuclear Non-Proliferation Act of 1978 |
| Nuclear Proliferation Prevention Act of 1994 |
| Nuclear Safety Research, Development, and Demonstration Act of 1980 |
| Nuclear Waste Policy Act of 1982 |
| Nuclear Waste Policy Amendments Act of 1987 |
| Nuisance Tax Extension Act |
| Nurse Education Amendments of 1985 |
| Nurse Education and Practice Improvement Amendments of 1992 |
| Nurse Training Act of 1964 |
| Nurse Training Act of 1971 |
| Nurse Training Act of 1975 |
| Nurse Training Amendments of 1979 |
| Nursery Stock Quarantine Act |
| Nurses Training Act |
| Nursing Shortage Reduction and Education Extension Act of 1988 |
| Nutrition Labeling and Education Act of 1990 |
| Nutrition Labeling and Education Act Amendments of 1993 |
| O and P Nonimmigrant Amendments of 1991 |
| Oath of Office Acts |
| OBRA |
| Obstruction of Interstate Commerce Act |
| Occupational Safety and Health Act of 1970 |
| Ocean Dumping Act |
| Ocean Dumping Ban Act of 1988 |
| Ocean Mail Acts |
| Ocean Pollution Reduction Act |
| Ocean Shipping Act of 1978 |
| Ocean Thermal Energy Conversion Act of 1980 |
| Ocean Thermal Energy Conversion Research, Development, and Demonstration Act |
| Oceans Act of 1992 |
| OCS Paperwork and Reporting Act |
| Odometer Disclosure Act |
| Office of Correctional Education Act of 1990 |
| Office of Education and Related Agencies Appropriation Act, 1972 |
| Office of Education Appropriation Act, 1971 |
| Office of Federal Procurement Policy Act |
| Office of Federal Procurement Policy Act Amendments of 1979 |
| Office of Federal Procurement Policy Act Amendments of 1983 |
| Office of Federal Procurement Policy Act Amendments of 1988 |
| Office of Government Ethics Amendment of 1992 |
| Office of Government Reports Act |
| Officer Grade Limitation Act of 1954 |
| Officer Personnel Act of 1947 |
| Officers Competency Certificates Act |
| Official and Penal Bonds |
| Offshore Shrimp Fisheries Act of 1973 |
| Offshore Shrimp Fisheries Act Amendments of 1975 |
| Oh! Grab Me Act (Embargo 1807) |
| Oil and Gas Prospecting Act |
| Oil Lands Leasing Act |
| Oil Pipe Line Act |
| Oil Pollution Act, 1924 |
| Oil Pollution Act, 1961 |
| Oil Pollution Act Amendments of 1973 |
| Oil Pollution Act of 1990 |
| Oil Terminal and Oil Tanker Environmental Oversight and Monitoring Act of 1990 |
| Oklahoma Welfare Act |
| Old Age Assistance Claims Settlement Act (Indians) |
| Old Age Pension Act |
| Old-Age, Survivors, and Disability Insurance Amendments of 1965 |
| Old Series Currency Adjustment Act |
| Older American Community Service Employment Act |
| Older Americans Act of 1965 |
| Older Americans Act Amendments of 1967 |
| Older Americans Act Amendments of 1969 |
| Older Americans Amendments of 1975 |
| Older Americans Act Amendments of 1981 |
| Older Americans Act Amendments of 1984 |
| Older Americans Act Amendments of 1986 |
| Older Americans Act Amendments of 1987 |
| Older Americans Act Amendments of 1992 |
| Older Americans Act Technical Amendments of 1993 |
| Older Americans Comprehensive Services Amendments of 1973 |
| Older Americans Personal Health Education and Training Act |
| Older Workers Benefit Protection Act |
| Oleomargarine Acts |
| Olympic Commemorative Coin Act |
| Olympic Winter Games Authorization Act of 1976 |
| O'Mahoney-Hatch Act |
| O'Mahoney-Ramspeck Act (Civil Service Extension To Postmasters) |
| Omnibus Act (Statehood) |
| Omnibus Acts of 1850 |
| Omnibus Adjustment Act of May 25, 1926 |
| Omnibus Budget Reconciliation Act of 1981 |
| Omnibus Budget Reconciliation Act of 1982 |
| Omnibus Budget Reconciliation Act of 1983 |
| Omnibus Budget Reconciliation Act of 1986 |
| Omnibus Budget Reconciliation Act of 1987 |
| Omnibus Budget Reconciliation Act of 1989 |
| Omnibus Budget Reconciliation Act of 1990 |
| Omnibus Budget Reconciliation Act of 1993 |
| Omnibus Claims Act |
| Omnibus Crime Control Act of 1970 |
| Omnibus Crime Control and Safe Streets Act of 1968 |
| Omnibus Diplomatic Security and Antiterrorism Act of 1986 |
| Omnibus Drug Supplemental Appropriations Act of 1987 |
| Omnibus Education Reconciliation Act of 1981 |
| Omnibus Flood Control Act |
| Omnibus Insular Areas Act of 1992 |
| Omnibus Judgeship Act |
| Omnibus Low-Level Radioactive Waste Interstate Compact Consent Act |
| Omnibus Oregon Wild and Scenic Rivers Act of 1988 |
| Omnibus Public Lands and National Forests Adjustments Act of 1988 |
| Omnibus Reconciliation Act of 1980 |
| Omnibus Small Business Capital Formation Act of 1980 |
| Omnibus Taxpayer Bill of Rights |
| Omnibus Territories Act of 1977 |
| Omnibus Trade and Competitiveness Act of 1988 |
| Omnibus Transportation Employee Testing Act of 1991 |
| One-Hundred-and-Sixty Acre Homestead Act |
| Onion Futures Act |
| Open Meetings, Government in the Sunshine Act |
| Operation Desert Shield/Desert Storm Supplemental Appropriations Act, 1991 |
| Opium Acts |
| Opium Poppy Control Act of 1942 |
| Options Pilot Program Act of 1990 |
| Ordnance Tool Act |
| Oregon Wilderness Act of 1984 |
| Organ Transplant Amendments Act of 1988 |
| Organic Act of Alaska |
| Organic Act of Guam |
| Organic Act of Puerto Rico |
| Organic Act of the Virgin Islands of the United States |
| Organic Foods Production Act of 1990 |
| Organized Crime Control Act of 1970 |
| Organotin Antifouling Paint Control Act of 1988 |
| Original Packages Act (Intoxicating Liquors) |
| Orphan Drug Act |
| Orphan Drug Amendments of 1985 |
| Orphan Drug Amendments of 1988 |
| Osage Act (Indians) |
| Osage Tribe of Indians Technical Corrections Act of 1984 |
| Outdoor Recreation Resources Review Act |
| Outer Banks Protection Act |
| Outer Continental Shelf Deep Water Royalty Relief Act |
| Outer Continental Shelf Lands Act |
| Outer Continental Shelf Lands Act Amendments of 1978 |
| Outer Continental Shelf Lands Act Amendments of 1985 |
| Outer Continental Shelf Operations Indemnification Clarification Act of 1988 |
| Overman Act |
| Overseas Citizens Voting Rights Act of 1975 |
| Overseas Differentials and Allowances Act |
| Overseas Private Investment Corporation Amendments Act of 1974 |
| Overseas Private Investment Corporation Amendments Act of 1978 |
| Overseas Private Investment Corporation Amendments Act of 1981 |
| Overseas Private Investment Corporation Amendments Act of 1985 |
| Overseas Private Investment Corporation Amendments Act of 1988 |
| Over-the-Counter Market Act |
| Overton-Whittington Flood Control Act |
| Ozark National Scenic Riverways Act |
| Pacific Northwest Electric Power Planning and Conservation Act |
| Pacific Railroad Acts |
| Pacific Salmon Treaty Act of 1985 |
| Pacific Yew Act |
| Packers and Stockyards Act, 1921 |
| Paddy Creek Wilderness Act of 1981 |
| Padre Island National Seashore Act |
| Paiute Indian Tribe of Utah Restoration Act |
| Palo Alto Battlefield National Historic Site Act of 1991 |
| Panama and Isthmian Canal Act |
| Panama Canal Acts |
| Panama Canal Act of 1979 |
| Panama Canal Amendments Act of 1985 |
| Panama Canal Commission Authorization Act, Fiscal Year 1986 |
| Panama Canal Commission Authorization Act, Fiscal Year 1987 |
| Panama Canal Commission Authorization Act, Fiscal Year 1990 |
| Panama Canal Commission Authorization Act for Fiscal Year 1991 |
| Panama Canal Commission Authorization Act for Fiscal Year 1992 |
| Panama Canal Commission Authorization Act for Fiscal Year 1993 |
| Panama Canal Commission Authorization Act for Fiscal Year 1994 |
| Panama Canal Commission Authorization Act for Fiscal Year 1995 |
| Panama Canal Commission Compensation Fund Act of 1988 |
| Panama Canal Revolving Fund Act |
| Panama Defense Road Act |
| Panama Railroad Company |
| Pan-American Naval Academy Act |
| Pandering Law |
| Paperwork Reduction Act of 1980 |
| Paperwork Reduction Act of 1995 |
| Paperwork Reduction Reauthorization Act of 1986 |
| Parcel Post Acts |
| Parental Kidnaping Prevention Act of 1980 |
| Parimutuel Licensing Simplification Act of 1988 |
| Parity Act |
| Parity Act (Coinage) |
| Parker-Watson Act |
| Parole Act |
| Parole Commission and Reorganization Act |
| Partial Payments Act (Railroads) |
| Participation Sales Act of 1966 |
| Partnership for Health Amendments of 1967 |
| Partnerships for Wildlife Act |
| Partnerships in Education for Mathematics, Science, and Engineering Act |
| Par Value Modification Act |
| Paskenta Band Restoration Act |
| Passenger Act of 1882 (Carriage by Sea) |
| Passenger Railroad Rebuilding Act of 1980 |
| Passenger Vessel Safety Act of 1993 |
| Patent and Plant Variety Protection Remedy Clarification Act |
| Patent and Trademark Office Authorization Act of 1991 |
| Patent and Trademark Office Authorization Act of 1993 |
| Patent Law Amendments Act of 1984 |
| Patent Law Foreign Filing Amendments Act of 1988 |
| Patents |
| Patterson Act |
| Pay and Allowances of the Uniformed Services |
| Pay-as-you-go Tax Act |
| Pay Readjustment Act (Army, Navy, etc.) |
| Pay Readjustment Act of 1942 |
| Pay Saving Act |
| Payment-in-Kind Tax Treatment Act of 1983 |
| Payment in Lieu of Taxes Act |
| Payments in Lieu of Taxes Act |
| Payne-Aldrich Act (Tariff) |
| Peace Corps Act |
| Peace Corps Act Amendments of 1978 |
| Pecan Promotion and Research Act of 1990 |
| Pecos National Historical Park Expansion Act of 1990 |
| Peer Review Improvement Act of 1982 |
| Pelagic Sealing Act |
| Pemigewasset River Study Act of 1989 |
| Penal Code |
| Penalty Mail Act of 1948 |
| Pendleton Act (Civil Service) |
| Penitentiary Act |
| Pennsylvania Avenue Development Corporation Act of 1972 |
| Pennsylvania Wilderness Act of 1984 |
| Penny Stock Reform Act of 1990 |
| Pension Acts |
| Pension Annuitants Protection Act of 1994 |
| Pension Policy Commission Act |
| Pension Protection Act |
| Peonage Abolition Act |
| Per Capita Act |
| Performance Management and Recognition System Amendments of 1991 |
| Performance Management and Recognition System Reauthorization Act of 1989 |
| Performance Management and Recognition System Termination Act |
| Performance Rating Act of 1950 |
| Perishable Agricultural Commodities Act, 1930 |
| Perishable Agricultural Commodities Act Amendments of 1995 |
| Permanent Appropriation Repeal Act, 1934 |
| Permanent Census Act |
| Pernicious Drug Acts |
| Persian Gulf Conflict Higher Education Assistance Act |
| Persian Gulf Conflict Supplemental Authorization and Personnel Benefits Act of 1991 |
| Persian Gulf War Veterans' Benefits Act |
| Persian Gulf War Veterans' Benefits Act of 1991 |
| Persian Gulf War Veterans' Health Status Act |