William Conor (Irish, 1881–1968) is a painter known for his depictions of the working class in Northern Ireland. Born in Belfast, Conor attended the Government School of Design, before beginning his career as a commercial artist. During the First World War, he was commissioned as a war artist, and created sketches of soldiers and munitions workers.

In 1918, he showed works at the Royal Hibernian Academy (RHA) in Dublin. Later, Conor moved to London, where he befriended artists such as John Lavery and Augustus John, and exhibited at the Royal Academy. After returning to Belfast, he opened a studio, and, apart from a brief stay in Philadelphia in the mid-1920s, remained there until his death.

Over the course of his career, he received numerous prestigious commissions, including a commission for the opening of the Northern Ireland Parliament, and a mural, Ulster Past And Present, for the Belfast Museum and Art Gallery. But his most well-known works are his crayon drawings and watercolors of ordinary, working-class people and scenes from everyday life, such as mill girls, shipyard workers, and Orange walks (annual parades held in Northern Ireland and Scotland).

He became an associate of the RHA in 1938, and a full member in 1946. His many honors include an OBE in 1952. He was also elected president of the Royal Ulster Academy in 1957, and served in this role for the next seven years.