Ullsfjorden (Norwegian) or Olggosvuotna (Northern Sami)[1] is a fjord in Troms county, Norway.

The fjord runs through the municipalities of Tromsø, Karlsøy, and Lyngen.

The islands of Reinøya and Karlsøya lie along the western side of the fjord.

The area surrounding the Ullsfjorden was part of Ullsfjord Municipality for about 60 years during the 20th century.

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