Count Josias I of Waldeck-Eisenberg (18 March 1554 – 6 August 1588), German: Josias I. Graf von Waldeck-Eisenberg, was since 1578 Count of Waldeck-Eisenberg. In the ten years of his short reign, Josias began to reform the long overdue state administration, including the regulation of the churches, which aimed to strengthen the internal affairs of the state and thus achieve a clear independence of the county and a separation from Hesse. To solve the problems of the time, however, a longer reign of Josias would have been necessary, as well as a like-minded attitude of the other counts of Waldeck. Among them he took the leading position.