Roger Williams is the Secretary of State for the US State of Texas.

Professor Roger Williams, CBE is a British medical doctor, specialising in hepatology (treatment of the liver). He is currently Director of the Institute of Hepatology at UCL University College, [[London]. A formidable and dynamic World leader in the field, he has inspired international research in diseases of the liver.

Roger Williams born 30 July 1954, in Cottingham, Yorkshire, is a British brass player. He plays trombone, tuba and euphonium.

Roger Williams (born in 1974 at Carmarthen, Wales) is a Welsh playwright and screenwriter working in both English and Welsh. His work often examines aspects of modern Welsh life, such as the place of minority languages, the plight of declining industrial communities and the Cardiff gay scene.