Biloxi Parish (also spelled Beloxy Parish) was a civil parish (county) of the Territory of Orleans, formed in January 1811 from Spanish West Florida, stretching from the Pearl River to "the river falling into the bay of " (the Tchoutacabouffa). The parish was eliminated in 1812 when Louisiana became a U.S. state, and all the Gulf of Mexico coastal lands from the Pearl to the Perdido rivers were transferred to the Mississippi Territory.
"Biloxi Parish" is referenced in the song of the same title by the band The Gaslight Anthem.