Joseph Morewood Staniforth (better known as J.M. Staniforth) (1863 - 21 December 1921) was a Welsh editorial cartoonist best known for his work in the Western Mail, Evening Express and Sunday weekly the News of the World. Staniforth has been described as '...the most important visual commentator on Welsh affairs ever to work in the country.'

Born in Cardiff, Staniforth first trained as a lithographic printer before becoming an art reviewer. He started publishing cartoons in 1889.

Usually published in the Western Mail, Staniforth's drawings and cartoons covered political and social unrest in Wales from 1890 through to the First World War. Although his cartoons followed editorial lines, Staniforth himself veered more towards the more tolerant Liberal-Labour movement and would attack both capitalist coal owners and the socialist unions.

In 1911 Staniforth was commissioned, by then Chancellor of the Exchequer, David Lloyd George to produce a piece of artwork to commemorate the investiture of Prince Edward as Prince of Wales at Caernarfon Castle. The artwork, in pencil and watercolour, was kept by Lloyd George who hung it in his study.