| Official Name: | Älgö |
| Pushpin Map: | Sweden Stockholm#Sweden#European Union |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Nacka Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Stockholm County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Uppland |
| Area Total Km2: | 0.201 |
| Population As Of: | 31 December 2020 |
| Population Footnotes: | [1] |
| Population Total: | 991 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 59.2653°N 18.3431°W |
Älgö is a locality situated in Nacka Municipality, Stockholm County, Sweden. It is also a peninsula next to Saltsjöbaden, in Stockholm Archipelago. Älgö is surrounded by Baggensfjärden, Ingaröfjärden and Erstaviken.
Since 2015, the settlement has been constituted as its own urban area.[2] The town already met the resident requirement for an urban area (200) by a very wide margin, but then had too high a proportion of leisure properties.
Älgö, which then belonged to Brännkyrka parish, was mentioned for the first time in 1416 ('in Alghøø') when Katarina Erengisledotter redeemed 2/3 of the island from Kristoffer and Peter Kruse. In a land register for Årsta estates, probably from 1529, a farm on Älgön is occupied. Gabriel Kristersson (Oxenstierna) owned this croft in 1652, which then annually paid 2 öre money, 6 days' work and fodder for three horses in lease. In 1573, two tithe-obliging farmers were recorded on Älgö.[3]