Procesa del Carmen Sarmiento de Lenoir (August 22, 1818 – September 15, 1899) was an Argentine painter and primary school teacher.

She taught at the College of Santa Rosa, while still taking classes in art and other specialties.

Because of her opposition to the government of Juan Manuel de Rosas, Processa and her brothers Domingo and Bienvenida were forced to emigrate to Chile, where they founded a school in San Felipe de Aconcagua.

In 1868, she returned permanently to San Juan, where in 1872, she taught painting at the High School for Girls, and in 1878, was president of the Charitable Society.

The "Year of Procesa Sarmiento Lenoir" was declared in 2008 in honor of her 190th birthday.