Missouri is a meeting place of rivers, roads, cultures and big American stories. It became the 24th state in 1821, helped shape the national debate over slavery, and became a launch point for westward movement. Today, its history is visible in the Gateway Arch, its river cities, the Ozarks and thousands of caves.
Here are 15 essential facts that make the Show-Me State far more interesting than its map position suggests.
1. Missouri became the 24th state on August 10, 1821.
Missouri joined the Union as the 24th state after Congress passed the Missouri Compromise. Its admission was a pivotal moment in the pre–Civil War political struggle over slavery and the balance of power between free and slave states.
2. It was the first state carved from the Louisiana Purchase territory.
Missouri’s creation gave the enormous Louisiana Purchase a new political center. It also put the state at the center of national arguments that could not be permanently settled by a congressional compromise.
3. Jefferson City is the capital—but it was not the first capital.
St. Charles served as Missouri’s first capital from 1821 until 1826. Jefferson City was selected as the permanent capital because of its more central location on the Missouri River.
4. St. Louis began as a French settlement in 1764.
Long before Missouri statehood, St. Louis was founded during the French colonial era. Its position near the confluence of the Mississippi and Missouri rivers made it a natural center for trade, migration and expansion.
5. The Gateway Arch is 630 feet tall.
St. Louis’s stainless-steel Gateway Arch is the nation’s tallest monument. It commemorates the city’s historic role as a gateway to the American West and anchors the National Park Service’s Gateway Arch National Park.
6. The Lewis and Clark story runs right through Missouri.
The Lewis and Clark National Historic Trail includes Missouri river communities and landscapes tied to the 1804 expedition. St. Charles is especially associated with the Corps of Discovery’s final preparations before heading up the Missouri River.
7. Missouri’s name is connected to “large canoes.”
The name Missouri likely came to English through a French rendering of an Algonquian name for the people associated with the river—often translated as “town of the large canoes.” The exact linguistic path is debated, but the river connection is central.
8. The “Show-Me State” nickname is famous, but its origin is not settled.
Missourians have embraced “Show-Me State” as a symbol of practical skepticism and proof over talk. The many stories about who coined it are colorful, but none has definitively settled the question.
9. Missouri’s seal literally counts its place in the Union.
The Great Seal, adopted in 1822, shows a constellation of 23 smaller stars surrounding a larger one—an intentional visual reference to Missouri becoming the 24th state.
10. Its state motto puts the public first.
Missouri’s official Latin motto is Salus populi suprema lex esto, commonly translated as “Let the welfare of the people be the supreme law.” It appears on the Great Seal beneath two bears.
11. Missouri’s flag was designed by Marie Elizabeth Watkins Oliver.
Adopted in 1913, the flag has red, white and blue horizontal stripes with the state coat of arms in the center. Its circle of 24 stars also honors Missouri’s order of admission to the Union.
12. The Ozarks are more than a vacation brand.
The Ozark region covers much of southern Missouri and is known for rugged hills, deep valleys, clear springs, streams and caves. It is one of the state’s defining natural landscapes.
13. Missouri is known as the Cave State.
Missouri State Parks says the state has almost 6,400 caves. Several—including Onondaga Cave, Cathedral Cave, Fisher Cave and Ozark Caverns—are available for public tours.
14. Its official dinosaur is a Missouri original.
Parrosaurus missouriensis is Missouri’s official state dinosaur. Fossils were found near Glen Allen, and the state’s only dinosaur site has played an outsized role in understanding dinosaurs that lived near the Western Interior Seaway.
15. Missouri has 114 counties—and one independent city.
St. Louis is independent of any county, an uncommon local-government arrangement in the United States. Along with 114 counties, it forms the state’s full county-level map.
Why Missouri matters
Missouri is not just a place people pass through. It is where national history, rivers, migration routes, city skylines and underground landscapes meet. That combination is why the state keeps showing up in the larger American story.
Quick Missouri FAQ
When did Missouri become a state?
August 10, 1821.
What number state was Missouri?
The 24th state.
What is Missouri’s capital?
Jefferson City.
Why is Missouri called the Show-Me State?
The nickname reflects a reputation for practical skepticism, though its precise origin is uncertain.
Sources
- Missouri State Archives: Antebellum Missouri
- Missouri Secretary of State: Great Seal
- Missouri Secretary of State: State Flag
- National Park Service: Gateway Arch
- Missouri Department of Natural Resources: Missouri Ozarks
- Missouri State Parks: Cave Tours
- Missouri Secretary of State: State Dinosaur