William Charles Smith (22 July 1881 – 20 November 1972) was an English musicologist who specialized in musical bibliographies.
Considered an authority on the life and works of George Frideric Handel, he notably published several books on the famous composer.
Smith also had a large private collection of Handel works, some of them original manuscripts.
He was also interested in chronicling the work of English music engravers and publishers of the period.
From 1900 to 1944 he was on staff of the British Museum, serving as Assistant Keeper of Printed Books from 1920 – 1944.