Cahokia Mounds State Historic Site


World Heritage Identification Number: 198

World Heritage since: 1982

Category: Cultural Heritage

Transboundary Heritage: No

Endangered Heritage: No

Country: 🇺🇸 United States of America

Continent: Americas

UNESCO World Region: Europe and North America

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Cahokia Mounds State Historic Site: A Preeminent Pre-Columbian Settlement in North America

The Cahokia Mounds State Historic Site, located approximately 13 kilometers northeast of St. Louis, Missouri, stands as a testament to the rich cultural heritage and architectural prowess of the indigenous peoples who inhabited the region during the Mississippian period (800–1400). Inscribed as a UNESCO World Heritage Site in 1982, this expansive archaeological park offers a unique glimpse into the lives of the ancient inhabitants who once thrived in this bustling metropolis.

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UNESCO Description of the World Heritage Site

Cahokia Mounds, some 13 km north-east of St Louis, Missouri, is the largest pre-Columbian settlement north of Mexico. It was occupied primarily during the Mississippian period (800–1400), when it covered nearly 1,600 ha and included some 120 mounds. It is a striking example of a complex chiefdom society, with many satellite mound centres and numerous outlying hamlets and villages. This agricultural society may have had a population of 10–20,000 at its peak between 1050 and 1150. Primary features at the site include Monks Mound, the largest prehistoric earthwork in the Americas, covering over 5 ha and standing 30 m high.

Encyclopedia Record: Cahokia

Cahokia Mounds is the site of a Native American city directly across the Mississippi River from present-day St. Louis. The state archaeology park lies in south-western Illinois between East St. Louis and Collinsville. The park covers 2,200 acres (890 ha), or about 3.5 square miles (9 km2), and contains about 80 manmade mounds, but the ancient city was much larger. At its apex around 1100 CE, the city covered about 6 square miles (16 km2), included about 120 earthworks in a wide range of sizes, shapes, and functions, and had a population of between 15,000 and 20,000 people.

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Additional Site Details

Area: 541 hectares

UNESCO Criteria: (iii) — Unique or exceptional testimony to a cultural tradition
(iv) — Outstanding example of a type of building or landscape

Coordinates: 38.65861111 , -90.06138889

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Country Information: United States of America

Flag of United States of America

Official Name: United States of America

Capital: Washington, D.C.

Continent: Americas

Population (2024): 340,110,988

Population (2023): 336,806,231

Population (2022): 334,017,321

Land Area: 9,147,420 sq km

Currency: United States dollar (USD)

Country Data Sources

Last updated: January 18, 2026

Portions of the page Cahokia Mounds State Historic Site are based on data from UNESCO — World Heritage List Dataset and on text from the Wikipedia article Cahokia, licensed under CC BY-SA 4.0. Changes made. Additional original content by World Heritage Explorer (WHE), licensed under CC BY-SA 4.0. WHE is not affiliated with UNESCO or the World Heritage Committee. Legal Notice. Privacy Policy.

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