William Vallance Gray (September 5, 1839 – October 15, 1891) was a Scottish-American artist, engraver, and lithographer active in San Francisco during the second half of the 19th century. Gray was born in Glasgow, Scotland. He emigrated to the United States sometime around 1860, settling in San Francisco. Gray was naturalized as a U.S. Citizen on October 16, 1868, by which time he had partnered in the lithography firm of Charles B. Gifford. Gray became prominent for his paintings and views of the American west. He was a member of several fraternal orders, including the Odd Fellows and the Scottish Thistle Club. He lies buried in the San Francisco Masonic Cemetery.