Hammarbytornet, Telecommunications tower in Hammarbyhöjden, Sweden.

Hammarbytornet is a telecommunications tower standing about 90 meters high in the Hammarbyhöjden neighborhood of Stockholm. The structure features an octagonal shape with vertical lines and smooth facades on each side, giving it a distinctive geometric appearance.

The tower was built between 1983 and 1986 for the Swedish National Board of Public Building (Byggnadsstyrelsen) on behalf of Televerket, after an architectural competition with eight invited firms won by Bengt Lindroos arkitektkontor, architect of the 155-metre Kaknästornet. The contractor was Johnson Construction Company and the structural engineer Kjellgren & Mellin. The underground Hammarby riksstation belonged to the complex and is no longer in service as copper telephony is phased out.

The tower's name comes from Hammarbyhöjden, the district where it stands, and locals know it as Hammarbytornet. It is green-marked by the Stockholm City Museum, a classification meaning it is considered particularly valuable from a historical, cultural, environmental or artistic point of view. The tower is normally unmanned and closed to the public.

The tower is normally unmanned and not accessible to the public. It stands directly on bedrock at Kalmgatan 37A in Hammarbyhöjden, so it can be viewed and photographed from the surrounding streets.

The building incorporates special protective steel hatches painted in red, blue, and yellow colors designed to resist pressure from explosions. These unusual safety features reflect the practical security approach taken when designing this telecommunications structure.