The Platino Award for Best Supporting Actor in a Miniseries or TV series (Spanish: Mejor Interpretación Masculina 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).

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 Actor in a Miniseries or TV series was first introduced alongside the Platino Award for Best Supporting Actress in a Miniseries or TV series category in 2020 at the 7th Platino Awards.^[1] Argentine actor Gerardo Romano was the first recipient of the award for his role as Director Sergio Antín in El Marginal.

No actor was won the award more than once while Mexican-Colombian actor Christian Tappan is the only actor to receive more than one nomination in the category with two consecutive nominations (2020 and 2021, winning the latter for The Great Heist).

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