Old Customs House, Historic customs building in Blasieholmen, Sweden.

The Old Customs House is a neorenaissance building from 1876 at Nybrokajen on Blasieholmen, designed by Axel Fredrik Nyström. A taller central section is flanked by two lower wings; large round-arched windows lit the open packing hall inside, and iron gates protected doors and windows at night. Clocks with dials hung above the gates, and the wings held staff offices.

Passenger and cargo traffic to southern Sweden, Denmark and Norway ran from Nybrokajen from 1852, and a customs department opened on the site in 1874. The customs house, also called a packing-house pavilion, was completed in 1876 to drawings by Axel Fredrik Nyström of the Överintendentsämbetet, built by the Customs Service but paid for by the city. The customs department closed in 1942.

The building's name comes from the customs department opened here in 1874 at what was then Norra Blasieholmshamnen. Around 1900, up to 80 percent of Stockholm's coffee imports were unloaded at this quay, alongside industrial goods. The large round-arched windows lit the open packing floor, and iron gates and doors protected it at night.

The building stands at the corner of Nybrokajen and Hovslagargatan on Blasieholmen, a short walk from Kungsträdgården metro station. It is an office building, not open to the public, so it is seen from the street and quay. A renovation is planned ahead of the Museum of the Holocaust's move, targeted for 2029.

In May 2018 the Land and Environment Court of Appeal at Nacka District Court overturned Stockholm's detailed plan for a Nobel Center on Blasieholmen, ruling it would cause "tangible damage" to the area's cultural heritage interest. The customs house and two nearby 1910s harbour warehouses, the last of their kind in Stockholm's port, had been slated for replacement.