| Official Name: | Silverdalen |
| Pushpin Map: | Sweden Kalmar#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Hultsfred Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Kalmar County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Småland |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.39 |
| Population As Of: | 31 December 2010 |
| Population Total: | 725 |
| Population Density Km2: | 522 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 57.5422°N 15.7497°W |
Silverdalen (Swedish for The Silver Valley) is a locality situated in Hultsfred Municipality, Kalmar County, Sweden with 725 inhabitants in 2010.
The Nässjö - Oskarshamn railway line passes through the settlement since 1874. It was given the name Silverdalen in 1931. Before that it was either called Hällefors or Råsa-Lönneberga. The paper mill located here was founded around 1874 and was in operation until year 2002 when M-real (which had taken over as owner in 2000) closed down its operation. The Municipality also had a railway which was completed in 1874.[2] The initial name of the railway stop was Rasa which later was later changed at the same time with the paper mill in 1931.[3] Together, they were named Silverdalen after a naming dispute with the Swedish postal service.[4] The train station was later closed down in 2014.[5] As of 2020, the population of Silverdalen was estimated to have declined to 666,[6] with the male population being at 330 while the female was at 336.[7]