She has received many awards and honors for her work in the area of women's rights and human rights, including the Capetillo-Roqué Medal from the Puerto Rican Senate, the Martin Luther King/Arturo Alfonso Schomburg Prize, and the Nilita Vientós Gastón Medal.

She was one of the founders of the Poetry Workshop led by Luis A. Rosario Quiles and Joserramón Meléndez at the university.

[1] In 1974, Rivera co-founded and edited the feminist publication El tacón de la chancleta (The heel of the flip-flop).

[5] In 1984, she published a regular column in El Reportero entitled "La mujer de siglo XXI" (Women of the 21st Century) and in 1988 co-founded the magazine Luna Nueva as a vehicle for Feministas en Marcha (Feminists on the March), for which she had been serving as spokesperson since 1983.

[9] This history, which retells the events of the feminist movement in Puerto Rico and the Caribbean, was detailed in her book Documentos del Feminismo en Puerto Rico: Facsímiles de la Historia, co-written with Elizabeth Crespo Kebler.

[13] In March 2024, the Citizen Victory Movement (CVM) selected Ana Irma Rivera Lassén as its candidate for Resident Commissioner of Puerto Rico in Washington DC.

[15] In 2006, she was the recipient of the "Martin Luther King/Arturo Alfonso Schomburg Prize" for her work against discrimination and for civil rights and the following year, received the Nilita Vientós Gastón Medal from the Puerto Rican Bar Association for her legal expertise.