Jan Městecký of Dobruška and Opočno, better known as Jan Městecký of Opočno (1380? - 1432 Hostinné) was an East Bohemian nobleman, the last of the family of the lords of Dobruška and Opočno and one of the personalities of the Hussite wars and one of the most important personalities of the so-called Opočno Party.
A lower nobleman originally from the Hradec Králové region became one of the most important Hussite politicians. By seizing the possessions of the Opatovice and Sezemice monasteries, he acquired extensive landed property, which enabled him to relocate to Kunětická Hora Castle. During his career he was hetman (governor) in Hradec Králové, Chrudim, Litomyšl and Vysoké Mýto cities. At the end of his life, he legalized most of his property gains, and for about two years he was also the purgrave of Prague Castle. As a military leader he had mixed successes. However, he was victorious in the most important battle at Lipany (1434) against radical hussites.