Beilstein is the result of three neighbouring villages growing together, Beilstein, Haiern and Wallendorf, the last of which had its first documentary mention in 774. Beilstein was granted town rights on 18 February 1321.
The establishment of Beilstein as a town is linked to the merging of three villages: Beilstein, Haiern, and Wallendorf.  Wallendorf's first documented mention dates back to 774, while Beilstein was granted town rights on February 18, 1321.