Fredrikstad (literally Fredrik’s Town) is a city and municipality in Østfold county, Norway. The administrative centre of the municipality is the city of Fredrikstad.

The city of Fredrikstad was founded in 1567 by King Frederick II, and established as a municipality on 1 January). The city straddles the river Glomma where it meets the Skagerrak. Along with neighboring Sarpsborg, Fredrikstad forms the fifth largest city in Norway:  The city centre is on the west bank of the Glomma, while the old town on the east bank is Northern Europe’s best preserved fortified town.

Fredrikstad used to have a large sawmill industry and was an important harbour for timber export, then later on shipbuilding, until the main yard was closed in the 1980s. The main industries are currently various chemical plants and other light industry.

In 2005, Fredrikstad was the final host port for the Tall Ships’ Race, attracting thousands to the city.

Uniteam Fredrikstad will market the same product range as the HQ in Skedsmokorset and the departments in Molde,  Ålesund, Bergen, Haugesund and Stavanger; container- and modular based solutions for the on-shore, offshore, medical and military markets.