Ann Williams (kelahiran tahun 1937) adalah seorang pakar abad pertengahan, sejarawan dan penulis asal Inggirs. Sebelum pensiun, ia bekerja di Polytechnic of North London, dimana ia menjadi Dosen Senior Sejarah Abad Pertengahan. Ia adalah anggota Society of Antiquaries dan anggota riset di University of East Anglia. Karya-karyanya meliputi:

 A Biographical Dictionary of Dark Age Britain: England, Scotland, and Wales, c.500–c.1050, Routledge (1991), dengan Alfred P. Smyth dan D. P. Kirby. Williams menulis entri-entri Inggris.
 The English and the Norman Conquest (Woodbridge, 1995)
 Land, Power and Politics: the family estates and patronage of Odda of Deerhurst (Deerhurst, 1997)
 Kingship and Government in Pre-Conquest England, c. 500–1066 (London, 1999)
 Æthelred the Unready: the ill-counselled king (London, 2003)
 The World Before Domesday: the English aristocracy, 900–1066 (London, 2008)

Referensi 
 Williams, Ann, Kingship and Government in Pre-Conquest England, c.500–1066 (London, 1999), back cover
 "Curriculum Vitae"

Akademisi Universitas London Utara