Countries Americas

The Americas have produced 32% of the world’s constitutional systems since 1789. The first constitution in the region was that of the United States in 1789, followed by that of Haiti in 1801. The average constitution over this period has endured 14.4 years.

Browse the timeline below, which is built from the Comparative Constitution Project’s chronology of constitutional events data, or explore the individual countries further to learn more.

Timeline of Constitutions

Data from the Comparative Constitutions Project.

Key to constitutions

PDF Link
No longer in force


For analysis of constitutional lifespans see: Elkins, Zachary, Tom Ginsburg, and James Melton. The Endurance of National Constitutions. Cambridge University Press, 2009.

Thanks to Jonathan Corum, who designed the original version of the timeline graphic.