What did Missouri used to be called?

Missouri was formerly known as the Territory of Louisiana.

The Evolution of Missouri's Name

The area that is now known as Missouri underwent a significant name change in the early 19th century, reflecting the dynamic expansion and organization of the United States. Prior to becoming the Territory of Missouri, the region was officially designated as the Territory of Louisiana. This change was a direct consequence of the geopolitical shifts occurring within the Louisiana Purchase territories.

From Louisiana to Missouri

The renaming of the territory was a pivotal moment in its history.

• Context: The vast lands acquired through the Louisiana Purchase were initially organized into several territories. One significant division was the Territory of Orleans, which covered the southern portion and was on its path to statehood.
• The Change: On June 4, 1812, following the admission of the Territory of Orleans into the Union as the State of Louisiana, the remaining northern portion, which had been the Territory of Louisiana, was officially renamed the Territory of Missouri. This renaming helped to avoid confusion between the new state and the continuing territory.
• Governance: Shortly after this name change, the newly designated Territory of Missouri began to establish its foundational governance. The first session of its territorial General Assembly notably convened in St. Louis on October 1, 1812, marking a new era for the region.

A Brief Timeline of Early Missouri Territorial History

To better understand this transition, here's a timeline illustrating the key dates related to Missouri's early territorial naming:

This historical progression highlights the administrative steps taken as the United States expanded westward, establishing clear designations for its growing territories.