William Morgan is the name of:

• A 16th century translator of the Bible (see: William Morgan (Bible translator));

• A person whose disappearance sparked anti-Freemason hysteria in the United States (see: William Morgan (anti-Mason))

• A scientist who won the Copley Medal in 1789 "for his two Papers on the values of Reversions and Survivorships, printed in the two last volumes of the Philosophical Transactions" (presumably in the field of actuarial science)

• William Wilson Morgan was a 20th-century astronomer.

• William Morgan Butler, a U.S. political figure in the 1920s

• William De Morgan (1839 - 1917), famed pottery and tile designer in Britain

• William G. Morgan , who invented volleyball in Holyoke, Massachusetts on February 9, 1895.