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Louisiana admitted as the 18th U.S. state

When: April 30, 1812
Where: formal act of admission in Washington, D.C.
Part of: Louisiana statehood and the renaming of Missouri Territory

The Territory of Orleans became the State of Louisiana on April 30, 1812, joining the Union as the eighteenth state.

Louisiana became the eighteenth U.S. state on April 30, 1812, as the Territory of Orleans was converted into the State of Louisiana. Congress had authorized the state on April 14, 1812, to expand its borders to include the Florida Parishes, but the state legislature did not approve the border change until August 4.

Sources

Louisiana Wikipedia, revision of 2026-09-24

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.