RMS Niagara was an ocean liner launched on 17 August 1912 and owned by the Union Steam Ship Company intended for the Australia-Vancouver, Canada service. She was nicknamed "the Titanic of the Pacific", but after the sinking of the real RMS Titanic this was dropped in favour of "Queen of the Pacific". She should not be confused with an earlier RMS Niagara, an ocean liner built in 1848 for the Cunard Line.