Nässjö Municipality () is a municipality in Jönköping County, southern Sweden where the town Nässjö is situated.
The present municipality was created in 1971 when the City of Nässjö (instituted in 1914) was amalgamated with five surrounding municipalities.
Localities
There are 11 urban areas (also called a Tätort or locality) in Nässjö Municipality.
In the table the localities are listed according to the size of the population as of December 31, 2005. The municipal seat is in bold characters.
{| class="wikitable"
! # !! Locality !! Population
|-
| 1 || Nässjö || 16,463
|-
| 2 || Bodafors || 1,982
|-
| 2 || Forserum || 1,982
|-
| 4 || Malmbäck || 1,016
|-
| 5 || Anneberg || 874
|-
| 6 || Solberga || 419
|-
| 7 || Grimstorp || 385
|-
| 8 || Fredriksdal || 318
|-
| 9 || Äng || 301
|-
| 10 || Flisby || 215
|-
| 11 || Stensjön || 208
|}
Demographics
This is a demographic table based on Nässjö Municipality's electoral districts in the 2022 Swedish general election sourced from SVT's election platform, in turn taken from SCB official statistics.
In total there were 31,732 residents, including 22,963 Swedish citizens of voting age.