The parish of Rendal was established as a municipality on 1 January 1838 (see formannskapsdistrikt law). This municipality was quite large, spanning  from the Østerdalen valley to the border with Sweden.
The parish of Rendal was inaugurated as a municipality on January 1, 1838 (as per formannskapsdistrikt law). This administrative division was notably extensive, encompassing the Østerdalen valley and extending into Sweden.