Henry Sandwith Drinker (September 15, 1880 – 1965) was an American lawyer and amateur musicologist. In 1964, the American Bar Association gave Drinker the American Bar Association Medal, stating that Drinker's monumental treatise Legal Ethics (Columbia U. Press 1953) was "recognized throughout the civilized world as the definitive treatise on this subject."
Henry S. Drinker was born to a prominent Quaker family in Philadelphia, the son of Henry Sturgis Drinker, who became president of Lehigh University. He had three brothers: Jim; Cecil, the founder of the Harvard School of Public Health; and Philip, inventor of the iron lung; and two sisters, Catherine and Ernesta.
Henry Drinker graduated from Haverford College in 1900 with an A.B., then earned another A.B. from Harvard University in 1901. He attended University of Pennsylvania Law School and Harvard Law School, earning his LL.B. in 1904 from Penn.
He married the musician Sophie Drinker (born Sophie Lewis Hutchinson), then moved to Merion, Pennsylvania. The couple had five children together: Sophie, Henry S., Jr., Cecelia, Ernesta, and Pemberton.
Drinker began working for what became Drinker Biddle & Reath in 1904, becoming a partner in 1918. The firm became one of the most prominent in Philadelphia.