István Plattkó also known as Esteban Platko (4 May 1883 – 16 November 1966) was a Hungarian football player and manager who coached Real Valladolid, Granada CF, CD Atlético Baleares and RCD Mallorca in Spain. His brothers were Franz Platko and Carlos Platko. Plattkó spent much of his coaching career in the Balearic Islands with CD Constancia, CD Binissalem and CD Atlético Baleares before he died in Palma, Majorca, Spain.