| Official Name: | Älvsbyn |
| Pushpin Map: | Sweden Norrbotten#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Älvsbyn Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Norrbotten County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Norrbotten |
| Area Footnotes: | [1] |
| Area Total Km2: | 6.35 |
| Population As Of: | 31 December 2010 |
| Population Total: | 4,967 |
| Population Density Km2: | 782 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 65.6833°N 22°W |
| Website: | www.alvsbyn.se |
Älvsbyn (pronounced as /sv/;[2] translating to "the river village") is a locality and the seat of Älvsbyn Municipality in Norrbotten County, Sweden with 4,967 inhabitants in 2010. It is known as "The Pearl of Norrbotten".
Älvsbyn has a railway station that is served by trains running between Boden and Stockholm along the Swedish east coast. It has a youth hostel with a small recreational park, including a swimming pool.
Älvsbyn is as its name suggest located right on the Pite River. Being in a relatively deep valley by Swedish standards, the location is prone to temperature inversion. As a result, diurnal temperature variation is usually high and winter nights can be extremely cold and average near the coldest among Swedish municipal seats. Under the Köppen system, Älvsbyn has a subarctic climate with four pronounced seasons. The inland location warms summer up compared to coastal areas nearby, whereas winters are highly variable depending on wind patterns.
The following sports clubs are located in Älvsbyn: