William Packard

• William Alfred Packard, American classical scholar
• William Doud Packard, American co-founder of Packard Motor Company
• William Guthrie Packard, American law book publisher, owner of Shepard's Citations
• William P. Packard, American politician
• William Packard (author), American poet, playwright, teacher, novelist, and founder/editor of the ''New York Quarterly''