Zoila Ugarte de Landívar, also known by her pseudonym Zarelia, (June 27, 1864 – November 16, 1969) was an Ecuadorian writer, journalist, librarian, suffragist, and feminist.

She began to use the pseudonym Zarelia in the weekly Tesoro del Hogar, founded by Lastenia Larriva de Llona, which was published between 1887 and 1893.

During Ugarte's early years contributing poems and short prose pieces to Tesoro del Hogar, she befriended various figures in Guayaquil's intellectual movement, such as Dolores Sucre and Numa Pompilio.

The magazine, which cost 40 cents at the time, contained articles about women's rights and their political, social, and workplace accomplishments.

In the first issue of La Mujer, Ugarte wrote: "Ignorance is not a guarantee of bliss, no matter what they say—we will never be convinced that an educated woman is incapable of domestic virtues; it seems impossible to us that she who is able to comprehend that which is abstract cannot serve any such role, which does not require talent but only a little will.

The magazine was shut down on various occasions because of its progressive messages and writing in favor of social and political rights for women.

During this period, Ugarte oversaw the collection of documents pertaining to the Battle of Huachi, the colonization of Zamora, and the Universidad Santo Tomás de Aquino, now known as the Central University of Ecuador.

On May 3, 1910, she published in the Quito newspaper La Patria an open letter directed to Ana Paredes de Alfaro, the wife of then-President Eloy Alfaro, in which she suggested Ana inform her husband that it would be prudent for him to leave power in order to prevent a lamentable situation for the Ecuadorian people.

In 1930, she invited feminists from the Spanish activist Belén de Sárraga's workshop to come speak at the Instituto Nacional Mejía in Quito.

Ugarte then invited Belén de Sárraga herself to give a conference on feminism at the Guayas Workers' Confederation.

[13] During the final years of her life, Ugarte participated in various Quito cultural institutions, including serving as president of the city's Press Circle.