100 Most Important Laws in American History

Name the 100 most important and impactful laws in American History

Many of the laws on here may not end with 'Act.' They may also be referred to by their more common name.

Type-ins on this quiz are expansive. However, abbreviations or the law will NOT work.

One law, marked in gold, was passed before the Constitution took effect.

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Last updated: March 21, 2026

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First submitted	March 21, 2026
Times taken	15
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	Field	Law
1960s	Civil Rights	Civil Rights Act of 1964
1960s	Civil Rights	Voting Rights Act of 1965
1930s	Welfare	Social Security Act
1820s	Statehood	Missouri Compromise
1940s	Foreign Aid	Marshall Plan
2010s	Healthcare	Affordable Care Act
1850s	Statehood	Kansas-Nebraska Act
1930s	Unions	National Labor Relations Act
1850s	Slavery	Compromise of 1850
1890s	Business	Sherman Antitrust Act
1950s	Infrastructure	Federal Aid Highway Act
1780s	Courts	Judiciary Act
1990s	Civil Rights	Americans with Disabilities Act
1860s	Civil Rights	Civil Rights Act of 1866
1860s	Statehood	Reconstruction Acts
1830s	Indian Affairs	Indian Removal Act
1940s	Veterans	Servicemen's Readjustment Act
1780s	Development	Northwest Ordinance
1860s	Development	Homestead Act
1960s	Accountability	Freedom of Information Act
1960s	Civil Rights	Fair Housing Act
1970s	Environment	Clean Water Act
1930s	Finance	Banking Act of 1933
2000s	Security	USA PATRIOT Act
1910s	Finance	Federal Reserve Act
1940s	Foreign Aid	Lend-Lease Act
1790s	Security	Alien and Sedition Acts
1900s	Business	Pure Food and Drug Act
1930s	Business	Fair Labor Standards Act
1880s	Accountability	Pendleton Civil Service Reform Act
1930s	Business	National Industrial Recovery Act
1790s	Slavery	Fugitive Slave Act of 1793
1880s	Immigration	Chinese Exclusion Act
1970s	Business	Occupational Health and Safety Act
1940s	Union	Labor-Management Relations Act
1800s	Slavery	Slave Trade Prohibition Act
1970s	Accountability	War Powers Resolution Act
2020s	Welfare	CARES Act
1910s	Prohibition	National Prohibition Act of 1919
1960s	Education	Elementary and Secondary Education Act
1790s	Finance	Act Establishing the First National Bank
1960s	Immigration	Immigration and Nationality Act of 1965
1960s	Environment	Clean Air Act of 1963
1870s	Security	Enforcement Acts of 1870 and 1871
1920s	Immigration	Immigration Acts of 1921 and 1924
1910s	Military	Selective Service Act
1930s	Finance	Security Exchange Act
1900s	Business	Federal Meat Inspection Act
1860s	Civil Rights	Freedmen's Bureau Act
1880s	Business	Interstate Commerce Act

	Field	Law
1970s	Business	Consumer Product Safety Act
1960s	Welfare	Social Security Amendments
1970s	Wildlife	Endangered Species Act
1940s	Foreign Affairs	United Nations Participation Act
1930s	Agriculture	Agricultural Adjustment Act
2010s	Finance	Dodd-Frank Act
1990s	Business	Family and Medical Leave Act
1930s	Tariffs	Tariff Act of 1930
1940s	Security	National Security Act of 1947
2000s	Finance	Troubled Asset Relief Program
1960s	Welfare	Food Stamp Act
1960s	Environment	National Environmental Policy Act of 1969
1910s	Business	Clayton Antitrust Act
1910s	Security	Sedition Act of 1918
1910s	Security	Espionage Act of 1917
1870s	Civil Rights	Civil Rights Act of 1875
1930s	Accountability	Hatch Act
1970s	Healthcare	Hyde Amendment
1810s	Finance	Act Establishing the Second National Bank
1860s	Development	Morrill Act
1990s	Safety	Violence Against Women Act
2010s	Civil Rights	Don't Ask Don't Tell Repeal Act
1910s	Business	Keating-Owen Child Labor Act
1950s	Civil Rights	Civil Rights Act of 1957
1940s	Accountability	Administrative Procedure Act
1920s	Civil Rights	Indian Citizenship Act
1970s	Security	Foreign Intelligence Service Act
2000s	Campaigns	Campaign Reform Act
2000s	Welfare	American Recovery and Reinvestment Act
2000s	Education	No Child Left Behind Act
1970s	Business	Airline Deregulation Act
1990s	Civil Rights	Religious Freedom Restoration Act
1950s	Science	National Aeronautics and Space Act
1970s	Campaigns	Federal Election Campaign Amendments
1950s	Business	Defense Production Act
1990s	Safety	Violent Crime Control and Law Enforcement Act
1990s	Voting	Motor Voter Act
1980s	Accountability	Whistleblower Protection Act
1990s	Safety	Brady Handgun Violence Protection Act
1960s	Civil Rights	Equal Pay Act of 1963
1980s	Environment	Superfund Act
1960s	Education	Higher Education Act
1940s	Immigration	Alien Registration Act
1980s	Immigration	Immigration Reform and Control Act
1950s	Education	National Defense Education Act
1990s	Business	Telecommunications Act
1790s	Finance	Funding and Debt Assumption Act
1960s	Safety	Omnibus Crime Control and Safe Streets Act
1930s	Business	Communications Act of 1934
1790s	Business	Copyright Act of 1790

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