| Official Name: | Älvsala |
| Pushpin Map: | Sweden Stockholm#Sweden#European Union |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Värmdö Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Stockholm County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Uppland |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.335 |
| Population As Of: | 31 December 2020 |
| Population Footnotes: | [2] |
| Population Total: | 381 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 59.3039°N 18.635°W |
Älvsala is a locality situated in Breviken, in the southeastern part of Värmdö Municipality, Stockholm County, Sweden.
The Värmdö maritime district was for a long time divided into quarters. In 1538, there was an Ulffzala quarter which consisted of the current Östra and Västra Älvsala as well as several farms situated westward. In 1580 these farms were merged into the Hemmesta quarter.
In 1719, Älvsala was burned down by the Imperial Russian Fleet, becoming one of many settlements in the Stockholm archipelago that got attacked in the Russian pillage of 1719–1721 as part of the Great Northern War.[3]
Alongside Statistics Sweden's changing of its method for determining agglomerations in 2015, four small areas of Älvsala, Fagerdala, Bullandö and Björkvik were merged, forming a new locality.[4] In 2020, the Fagerdala area was mined out and renamed to Västra Älvsala.
Today, the area is partly covered by holiday home developments. Värmdö municipality officials predict that the number of permanent residents is eventually going to increase.[5]