Charles Joseph Faulkner (1833–92) was a mathematician and fellow of University College, Oxford and a founding partner of Morris, Marshall, Faulkner and Co. where he worked with his sisters Kate Faulkner and Lucy Faulkner Orrinsmith.
Faulkner was part of a group of Birmingham men at Pembroke College, Oxford known among themselves as the "Brotherhood" and to historians as the Birmingham Set, along with Richard Watson Dixon and William Fulford. Through them he met William Morris and Edward Burne-Jones, with whom he worked on a number of projects, including the Oxford Union murals and the decoration of Red House. He left Oxford to train as a civil engineer in London in 1860, and in 1861 become a founder-shareholder and shortly thereafter financial manager of the decorative arts firm Morris, Marshall, Faulkner & Co., along with the Pre-Raphaelite artists Morris, Burne-Jones, Ford Madox Brown, and Dante Gabriel Rossetti, as well as engineer P. P. Marshall, and architect Philip Webb. Faulkner participated in the firm's early design commissions including painting the chancel roof of St Michael's Church, Brighton. Faulkner's sisters Kate Faulkner and Lucy Faulkner Orrinsmith were also associated with the firm as artists and designers. Two of Charles Faulkner's cartoons or design drawings for stained glass, part of a series depicting the story of Dives and Lazarus, are in the Victoria and Albert Museum.