Arthur George Morrison (1 November 1863 – 4 December 1945) was an English writer and journalist known for realistic novels, for stories about working-class life in the East End of London, and for detective stories featuring a specific detective, Martin Hewitt. He also collected Japanese art and published several works on the subject. Much of his collection entered the British Museum, through purchase and bequest. Morrison's best known work of fiction is his novel A Child of the Jago (1896).

Morrison was born on 1 November 1863 in suburban Poplar. His father George was an engine fitter at the London Docks in Wapping, who died in 1871 of tuberculosis, leaving his wife Jane with Arthur and two other children. Arthur spent his youth in the East End. In 1879 he began work as an office boy in the Architect's Department of the London School Board. He later remembered frequenting used bookstores in Whitechapel Road about this time. In 1880 Arthur's mother took over a shop in Grundy Street. Morrison published his first work, a humorous poem, in the magazine Cycling in 1880, and took up cycling and boxing. He continued to publish in various cycling journals.

In 1885 Morrison placed his first serious journalism in the newspaper The Globe. After working his way up to the rank of third-class clerk, he was appointed in 1886 to a job at the People's Palace in Mile End. In 1888 he gained reading privileges at the British Museum and published a collection of 13 sketches, Cockney Corner, describing life and conditions in several London districts, including Soho, Whitechapel and Bow Street. In 1889 he became an editor of the paper Palace Journal, reprinting some of his Cockney Corner sketches there and commenting on books and other matters, including life for London's poor.

In 1890 Morrison left that job for the editorial staff of The Globe and moved to lodgings in the Strand. In 1891 his first book appeared, The Shadows Around Us, a collection of 15 supernatural stories. This was not reissued till 2016, by Ulwencreutz Media. In October 1891 his short story A Street was published in Macmillan's Magazine. In 1892 he collaborated with the illustrator J. A. Sheppard on a collection of animal sketches, one entitled My Neighbours' Dogs being for The Strand Magazine. Later that year he married Elizabeth Thatcher at Forest Gate. He befriended the writer and editor William Ernest Henley and supplied stories of working-class life for Henley's National Observer between 1892 and 1894. His son Guy Morrison was born in 1893.

In 1894 Morrison published his first detective story to feature the detective Martin Hewitt. In November came a short story collection, Tales of Mean Streets, dedicated to Henley. This was reviewed in 1896 in America by Jacob Riis. Morrison later said that the work was publicly banned. Reviewers of the collection objected to his story Lizerunt, causing Morrison to write a response in 1895. Later in 1894 he published Martin Hewitt, Investigator. In 1895 he was invited by writer and clergyman Reverend A. O. M. Jay to visit the Old Nichol rookery. Morrison continued to show interest in Japanese art, to which he was introduced by a friend in 1890. Morrison began writing his novel A Child of the Jago in early 1896. Brought out that November by Henley, it details living conditions in the East End, including the permeation of violence into everyday life, in a barely fictionalised account of life in the Old Nichol Street Rookery. He also published The Adventures of Martin Hewitt in 1896. A second edition of A Child of the Jago appeared in 1897.

In 1897 Morrison issued six short stories covering the exploits of Horace Dorrington. Unlike Martin Hewitt, Dorrington, as one critic put it, was a "low-key, realistic, lower-class answer to Sherlock Holmes". He was noted as "a respected but deeply corrupt private detective," "a cheerfully unrepentant sociopath who is willing to stoop to theft, blackmail, fraud or cold-blooded murder to make a dishonest penny." The stories were collected in The Dorrington Deed-Box, also published in 1897.

In 1899 Morrison published To London Town as the final instalment of a trilogy including Tales of Mean Streets and A Child of the Jago. His Cunning Murrell was published in 1900, followed by The Hole in the Wall in 1902. He continued to issue a wide variety of work through the 1900s, including short story collections, one-act plays and articles on Japanese art. In 1906 he sold a collection of Japanese woodcuts to the British Museum. He also completed a play in collaboration with a neighbour, Horace Newte.

Morrison lived and wrote successively at Chingford and Loughton.