William Casey (disambiguation)
William J. Casey was the Director of Central Intelligence.
William, Willie, or Bill Casey may also refer to:
Sports
Gaelic football
- Bill Casey (Gaelic footballer), Irish Gaelic footballer
- Willie Casey (Gaelic footballer), Irish Gaelic footballer
- Bill Casey (Dublin Gaelic footballer), Irish Gaelic footballer
Other sports
- Bill Casey (Australian footballer), Australian rules footballer
- Mickey Casey, American baseball player
- William Casey (bobsleigh), American bobsledder
- Willie Casey, Irish professional boxer
Others
- William E. "Bert" Casey, notorious Oklahoma Terroritory outlaw
- William Casey (priest), Catholic priest and leading member of the Irish National Land League
- William Casey (bishop), Anglican bishop in Ireland
- Father William Casey, who established Father Casey's GAA in 1884
- William Francis Casey, journalist and editor of The Times
- William Casey (Kentucky politician), American politician, settler, and military officer
- William J. Casey (Massachusetts politician), American politician
- Bill Casey, Canadian politician
- William H. Casey, American professor of chemistry and of geology