Ronov Castle (Czech: hrad Ronov) is a castle ruin northeast of Blíževedly in the Česká Lípa District in the Liberec Region of the Czech Republic. The remains of the castle are protected as a cultural monument of the Czech Republic. The oldest direct reports about the castle come from the 15th century. In 1438, it was owned by Vilém of Ilburk, who significantly rebuilt the castle. After 1538, Ronov castle was abandoned and gradually became a ruin.