Ana Micaela Monterroso de Lavalleja (3 September 1791 – 28 March 1858) was an Uruguayan woman who was the wife of Juan Antonio Lavalleja and traveled with Lavalleja and participating in the politics of the world around her.
Whether or not Lavallejas was present in the household, Monterroso ran the family's affairs and would actively aid the resistance to the Portuguese and the government of Fructuoso Rivera.
She and Lavalleja would have ten children, some of whom died young.
She, along with Melchora Cuenca and Cayetana Leguizamón, represent the involvement of women in the early history of modern Uruguay.