On 1 January 1838, the large
Rendal Municipality was established. This municipality spanned from the
Østerdalen valley to the border with
Sweden. During the 1870s, discussions began on dividing the large municipality. On 1 January 1880, Rendal Municipality was split in two to create the new
Øvre Rendal Municipality (population: 1,868) in the north and Ytre Rendal Municipality (population: 1,661) in the south. The new Ytre Rendal Municipality had an area of . On 1 January 1911, of eastern Ytre Rendal Municipality (population: 311) was removed from the municipality and merged with of eastern
Øvre Rendal Municipality (population: 381), of southeastern
Tolga Municipality (population: 201), and of northern
Trysil Municipality (population: 291) to create the new
Engerdal Municipality, located to the east of the remaining Øvre Rendal Municipality. Historically, the name of the municipality was spelled
Ytre Rendalen. On 3 November 1917, a
royal resolution changed the spelling of the name of the municipality to
Ytre Rendal, removing the
definite form ending
-en.
Churches The
Church of Norway had one parish () within Ytre Rendal Municipality. At the time of the municipal dissolution, it was part of the Rendal
prestegjeld and the
Nord-Østerdal prosti (
deanery) in the
Diocese of Hamar. ==Geography==