Felicitas Gómez Martínez de Méndez was a Puerto Rican activist in the American civil rights movement. In 1946, Méndez and her husband, Gonzalo, led an educational civil rights battle that changed California and set an important legal precedent for ending de jure segregation in the United States. Their landmark desegregation case, known as Mendez v. Westminster, paved the way for meaningful integration and public-school reform.

Mendez, et al v. Westminister [sic] School District of Orange County, et al, 64 F.Supp. 544, aff'd, 161 F.2d 774, was a 1947 federal court case that challenged Mexican remedial schools in four districts in Orange County, California. In its ruling, the United States Court of Appeals for the Ninth Circuit, in an en banc decision, held that the forced segregation of Mexican American students into separate "Mexican schools" was unconstitutional because as US District Court Judge Paul J. McCormick stated, "The evidence clearly shows that Spanish-speaking children are retarded in learning English by lack of exposure to its use because of segregation, and that commingling of the entire student body instills and develops a common cultural attitude among the school children which is imperative for the perpetuation of American institutions and ideals."