Oslofjord is the fjord leading up to Oslo, Norway.

Oslofjord may also refer to:

• Any of several ships operated by the Norwegian America Line:
  • {{SS|Oslofjord}}, a ship used by the Norwegian America Line, 1923–1930
  • {{MS|Oslofjord|1938}}, an ocean liner operated by the Norwegian America Line, 1938–1940
  • {{MS|Oslofjord|1949}}, a combined ocean liner/cruise ship operated by the Norwegian America Line, 1949–1967
• MS Oslofjord (1993), a passenger ferry operated by Fjord Line

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