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.

His innovation made sugar cane profitable as a commodity crop and planters began to cultivate it in quantity.

De 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.

On leaving school, he entered French military service in the elite Musketeers of the Guard, which was part of the royal household and very prestigious.

As part of her dowry, de Boré acquired an estate on the left bank of the Mississippi 6 miles (9.7 km) north of New Orleans.

[1] De Boré and his bride returned to Louisiana, then under Spanish control, to raise indigo on the plantation with its more than 80 enslaved people of African and American descent.

Competition from Guatemala reduced the profitability of indigo, the soil was too poor for cotton, and the maize produced had no export value.