The POTUS Timeline
Legislation

Illinois admitted as the 21st state

On December 3, 1818, Congress admitted Illinois to the Union and President James Monroe completed the admission process, making Illinois the 21st state.

Statehood incorporated a large trans-Ohio territory into the United States, advancing westward expansion and influencing the sectional balance between free and slave states in Congress.

References / Sources

No source references have been added for this event yet.

Related Timeline Entries