RMS Lady Nelson was a steam turbine ocean liner which served in passenger service from 1928 to 1968 and operated as wartime hospital ship from 1943 to 1945.

One of a class of five sister ships popularly known as "Lady Boats", she was built for the Canadian National Steamship Company (CNS).

Like her sisters Lady Nelson was an oil-burner, with a set of four Cammell Laird steam turbines driving the propeller shafts to her twin screws by single-reduction gearing.

After her launch, Lady Nelson was introduced to Canadian ticket and travel agents when the ship hosted a special lunch, press conference and tour to introduce the "Lady Boats" on 27 November 1928 at Pier 21 in Halifax, Nova Scotia where the ships were acclaimed as "the finest boats afloat" in North America.

[8] Completed as a hospital ship in April 1943, Lady Nelson had an operating theatre, x-ray machine and wards for 515 men.

However declining passenger traffic due to air travel, high fuel consumption from the ship's turbine engines and rising labour costs made the Lady Boats too expensive to run.

[12] A large model of the ship in hospital colours is displayed at the Canadian Museum of Immigration at Pier 21 in Halifax at the terminal where Lady Nelson operated for most of her career.