Lady Cynthia circa 1938
|Builder:||Ardrossan Dry Dock & Shipbuilding Company|
|Launched:||20 March 1919|
|Fate:||Sold 1 December 1921; renamed Lady Cynthia; broken up 1957|
|Class and type:||Hunt class minesweeper (1916), Aberdare sub-class|
|Length:||231 ft (70 m)|
|Beam:||28 ft (8.5 m)|
|Draught:||8 ft (2.4 m)|
|Propulsion:||Yarrow-type boilers, Vertical triple-expansion engines, 2 shafts, 2,200 ihp|
|Speed:||max 16 knots|
|Range:||140 tons coal|
HMS Barnstaple was a Hunt class minesweeper of the Royal Navy from World War I.
She served as Lady Cynthia after major modifications as a coastal steamship with the Union Steamship Company of British Columbia, Canada from 1925 to 1957.