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October 17, 2025

States ratify 27 constitutional amendments since 1789

National Archives Foundation
Bill of Rights Institute
Constitution Congress
Constitution Congress
Constitution Congress
+8

27th Amendment took 203 years to secure ratification

Article V requires two-thirds vote to propose amendments

Three-fourths of states must ratify

📜Constitutional Law

People, bills, and sources

What you can do

1

Read all 27 amendments

Visit National Archives for amendment texts