Mervin Clark Stanley (May 6, 1857 in New Britain, Hartford County, Connecticut – February 1, 1907 in New York City) was an American businessman and politician from New York.
He was the son of Oliver Cromwell Stanley (1823–1871) and Charlotte (Hine) Stanley (1823–1897). He became a lumber, coal and builders' supplies merchant in New Britain. On January 23, 1884, he married Martha Fenn Miles (1863–1918). In 1899, he removed to New York City, and became a partner in a firm of commission merchants and exporters.
He entered politics as a Republican, and became a personal friend of Gov. Charles Evans Hughes. Stanley was a member of the New York State Assembly in 1905, 1906 (both New York Co., 19th D.) and 1907 (New York Co., 15th D.).
He died on February 1, 1907, at his home at 329 West 82nd Street in Manhattan, after two operations for appendicitis; and was buried at the Fairview Cemetery in New Britain.