The Sint-Janskerk, in full Sint Jan de Doper, is a former Roman Catholic church on the Markt in Roosendaal.
Roosendaal was initially dependent on the parish of Nispen. In 1268 a chapel was built which was replaced by a new church in the 3rd quarter of the 15th century. In 1510 it was elevated to parish church, dedicated to Saint John. Like the parish of Nispen, the patronage of the parish of Roosendaal rested with the Abbey of Tongerlo. During the last quarter of the 16th century, during the Eighty Years' War, the church was severely damaged several times by fire and plundering. In 1648 it was seized by the Protestants and the Catholics had to seek refuge in a clandestine church. In 1792 permission was granted to rebuild the Sint Jan. However, the church had fallen into disrepair, and the western part of the church was largely demolished in the 17th century. The church was also considered too small by the Catholics. That is why it was demolished and replaced by a water board church. Only the tower remained, and the new church was built against it. In 1839 the church was consecrated. The clandestine church was converted into a hospice.