约翰·瓦利John Varley（1778年8月17日——1842年11月17日），英国画家。瓦利发表景观制图原则一篇论文，1816年至1821年和实用伤寒论绘画的透视艺术。他还写了占星有权文本（插图）上的一篇论文本命 地貌于1828年。
John Varley was born at the Old Blue Post Tavern, Hackney, on 17 August 1778. His father, Richard Varley, born at Epworth in Lincolnshire, had settled in London after the death of his first wife in Yorkshire. For a brief time John Varley was employed by a portrait painter in Holborn and then, at the age of 15 or 16, he became a pupil of Joseph Charles Barrow (fl. 1789–1802) who had an evening drawing school twice a week at 12 Furnival's Inn Court, Holborn. It was Barrow who took Varley on a sketching tour to Peterboroughfrom which he emerged as a professional painter. In 1798 he exhibited a highly regarded sketch ofPeterborough Cathedral at the Royal Academy and became a regular exhibitor at the RA until the foundation of the Old Watercolour Society in 1805.
As one of the founders of the OWS Varley exhibited largely there, over 700 drawings. He also became a highly successful drawing master with pupils including Copley Fielding, David Cox, John Linnell andWilliam Turner (artist) of Oxford. Despite his success he was constantly in financial difficulties, "since he was both a hopeless businessman and by temperament something of a Micawber". (Mallalieu). Varley was particularly skilled at the laying of flat washes of watercolour which suited the placid, contemplative mood that he often sought to evoke.
Varley published A Treatise on the Principles of Landscape Drawing, 1816–21 and A Practical Treatise on the Art of Drawing in Perspective. He also wrote an astrological text (with illustrations) entitled A Treatise on Zodiacal Physiognomy in 1828.
He is buried at Kensal Green Cemetery.