Peter Williams (born 29 September 1945 in Nottingham England) is a former motorcycle road racer who enjoyed success when competing at many levels on home short-circuits, International and Grand Prix races. He raced many times on the Isle of Man TT course from 1966 to 1973. His father was Jack Williams who ran the Associated Motor Cycles (AMC) race department. Peter trained in mechanical engineering and introduced via racing an innovation which is commonplace on today's road bikes, alloy wheels, and was an early pioneer of disc brakes. He raced in the era of Giacomo Agostini, Barry Sheene, Mick Grant, Percy Tait, Tony Jefferies, Paul Smart, Dave Potter and John Cooper.

Williams started his racing on UK short-circuits in 1964 and won the 250 cc class of the 1964 Thruxton 500 race on an AJS model 14 CSR partnered by Tony Wood.

He first entered the Isle of Man Manx Grand Prix in 1964 on a Norton In 1965 he entered the Senior race on his Dunstall Norton Dominator 500cc twin suffering con-rod breakage of the left cylinder when lying 3rd but scored a third place in Lightweight 250cc category riding an Orpin Greeves Silverstone.

Williams entered selected Grand Prix races from 1966. He also regularly competed in TT races from 1966, scoring one 1st place and seven 2nd places. He won the 1966 North West 200 500cc race in Northern Ireland on a Matchless, and placed 2nd in the 250cc class on a Greeves Silverstone

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