Opoczno ([ɔˈpɔt͡ʂnɔ] ) is a town in south-central Poland, seat of Opoczno County in the Łódź Voivodeship.
Founded in the Middle Ages, Opoczno is a former royal town of Poland, which used to be one of the most important urban centers of northwestern Lesser Poland. It prospered as a trade center due to its location at the intersection of important trade routes. Currently, Opoczno is an important road and rail junction; its patron saint is Saint Cecilia, and the town is famous across Poland for its folklore and ceramics manufacturing.