Jean Étienne de Boré (27 December 1741 – 1 February 1820) was a Creole French planter, born in Kaskaskia, Illinois Country, who was known for producing the first granulated sugar in Louisiana.
At the time, the area was under Spanish rule.
His innovation made sugar cane profitable as a commodity crop and planters began to cultivate it in quantity.
He owned a large plantation upriver from New Orleans.
Boré was a prominent planter in the area when the United States made the Louisiana Purchase and acquired the former French territories west of the Mississippi River.
In 1803 the American governor of the territory appointed de Boré as the first mayor of New Orleans under the U.S.