The municipality of Lierne was established on 1 January 1874 when it was separated from the large
Snaasen Municipality. Initially, the population of Lierne Municipality was 1,015. On 1 July 1915, it was divided into two:
Nordli Municipality (population: 863) in the north and
Sørli Municipality (population: 739) in the south. This division, however, was short-lived. During the 1960s, there were many municipal mergers across Norway due to the work of the
Schei Committee. On 1 January 1964,
Nordli Municipality and
Sørli Municipality were merged back together again under the former name
Lierne Municipality. After the merger, there were 2,045 residents in the new municipality. On 1 January 2018, the municipality switched from the old
Nord-Trøndelag county to the new
Trøndelag county.
Name The municipality (originally the
parish) is named after the old name for the region () which means "mountainside" (similar to the Norwegian word
li). Historically, the prefix
Finna- was often added to the name: . This prefix is the
plural genitive case of which means "
Sami person" (or
Finn) because the district historically had a significant sami population. Later, the prefix was dropped and the definite plural form of
li was used,
Lierne. The
li name lives on in many places in the municipality such as Nordli and Sørli.
Coat of arms The
coat of arms was granted on 3 February 1984. The official
blazon is
"Azure, three grouses argent, two over one" (). This means the arms have a COLOR
field (background) and the
charge is three
Willow Ptarmigans
(Lagopus lagopus), a type of local
grouse. The ptarmigan design has a
tincture of
argent which means it is commonly colored white, but if it is made out of metal, then silver is used. This design was chosen because these birds are plentiful in the area. Historically, hunting ptarmigan was of great importance for the survival of the inhabitants during the winters. The bird was thus chosen as a symbol for the municipality. The arms were designed by Einar H. Skjervold.
Churches The
Church of Norway has two parishes () within Lierne Municipality. It is part of the
Namdal prosti (
deanery) in the
Diocese of Nidaros. ==Geography==