- Source: William Killen
- Ignatius dari Antiokhia
- Center for Science and Culture
- Keprimatan Irlandia
- Daftar Menteri Pertahanan Australia
- Atlanta Rhythm Section
- Kematian tahun 2018
- Penghargaan Grammy ke-54
- Piala Konfederasi FIFA 2003
- Middlesbrough F.C.
- Skuad Piala Dunia FIFA 2010
- William Killen
- Bill Killen
- James Killen
- Buddy Killen
- Edgar Ray Killen
- Delaware Court of Chancery
- William Dool Killen
- Killen (surname)
- Red Hand Commando
- Nicholas Ridgely (born 1762)
William Killen may refer to:
William Dool Killen (1806–1902), Irish Presbyterian minister and church historian
William Wilson Killen (1860–1939), Australian politician
Bill Killen (William M. Killen, born 1938), American politician
William Killen (1722–1805), Irish-born first chief justice and first chancellor under the Constitution of 1792 of the state of Delaware, U.S.