Joan Gillchrest (1918–2008) was a British painter best known for her colourful naïve-style depictions of life in Cornwall. Born in London as Joan Scott, she studied at the Grosvenor School of Art and exhibited early in her career at institutions including the Royal Academy and the New English Art Club.

In 1958 she moved to the fishing village of Mousehole in Cornwall, where the local landscape and coastal communities became the central subjects of her work. Her paintings often portray harbours, fishing boats and village life, rendered in a distinctive, simplified style influenced by artists associated with the St Ives School such as Christopher Wood and Alfred Wallis.

Gillchrest exhibited widely in Cornish galleries from the late 1960s onwards and gained a strong following for her lively and characterful scenes of coastal life. Today her work remains closely associated with the artistic traditions of West Cornwall and the post-war St Ives milieu.