Platino Award for Best Supporting Actress in a Miniseries or TV series

The Platino Award for Best Supporting Actress in a Miniseries or TV series (Spanish: Mejor Interpretación Femenina de Reparto en Miniserie o Teleserie) is one of the Platino Awards, Ibero-America's film awards presented annually by the Entidad de Gestión de Derechos de los Productores Audiovisuales (EGEDA) and the Federación Iberoamericana de Productores Cinematográficos y Audiovisuales (FIPCA).

History
Until the 3rd edition of the awards, only film categories were awarded. In 2017, the category for Best Miniseries or TV series was introduced, being followed the next year by performance categories in television productions (male lead and female lead).

The category for Best Supporting Actress in a Miniseries or TV series was first introduced alongside the Platino Award for Best Supporting Actor in a Miniseries or TV series category in 2020 at the 7th Platino Awards. Spanish actress Alba Flores was the first recipient of the award for her role as Ágata Jiménez (Nairobi) in Money Heist.

No actress has won this award more than once while Najwa Nimri is the only actress who has been nominated multiple times in the category with three nominations, winning in 2022 for Money Heist.

In the list below the winner of the award for each year is shown first, followed by the other nominees.