Ken Williams is a British aikido practitioner.
He was Kenshiro Abbe's first student in the United Kingdom and was his primary full time-assistant. He was responsible for much of the spread of aikido and Ki-aikido in the United Kingdom, with most British aikidoka's lineage traced to Ken Williams. In 1958 he was national coach for the British Aikido Council.
Kenshiro Abbe brought many prominent Japanese aikidoka to the United Kingdom, and Ken Williams studied under Mutsuro Nakazono, Masamichi Noro, Nobuyoshi Tamura and Hiroshi Tada.