William H. Crook (1925-1997) was an American preacher turned politician, national director of the Volunteers in Service to America (VISTA) program and US Ambassador to Australia.
Crook was born in Momence, Illinois.
In 1954, Crook married Eleanor Butt, daughter of Howard Edward Butt Sr., the founder of the H-E-B grocery store chain. They had three children, William Crook Jr., Elizabeth Crook, and Noel Moore.