William Harold Cubley (9 October 1816 – 1896) was an English painter of landscapes and portraits in the tradition of Sir Joshua Reynolds.

He took lessons in London with Richard Rothwell, member of the Royal Hibernian Academy and former studio assistant to Sir Thomas Lawrence.

[1] In his 80th year he fell ill while on a painting trip in Wales, and died shortly afterwards at Bryndu, Llanberis, on 10 August 1896.

He exhibited both at the Royal Academy, where he showed Kate Kearney in 1863, Evening in the Lledr Valley, North Wales in 1868, Llyn Idwal in 1872 and A midsummer night – Abermaw Harbour, near Barmouth, North Wales in 1873,[7] and also at the Suffolk Street gallery of the Society of British Artists.

His landscape Llyn Idwal was shown again at the Third Annual International Exhibition in London in 1873, where it won a gold medal and was bought by the Walker Art Gallery of Liverpool.