The tenth largest lake in Sweden, Bolmen, is located in the north-western part of the municipality.

There are 8 urban areas (also called a tätort or locality) in Ljungby Municipality.

This is a demographic table based on Ljungby Municipality's electoral districts in the 2022 Swedish general election sourced from SVT's election platform, in turn taken from SCB official statistics.

Vikings followed the river Lagan and lived in its vicinity, and one of the locations were in what is now Ljungby Municipality.

During the 19th century the area closest to Ljungby itself consisted mostly of sand without any vegetation, and the government released funds to plant trees which would tie together the sand and make it suitable for plants.