Australian rules football •
Peter Williams (Australian footballer, born 1867) (1867–1949), VFL footballer for Carlton •
Peter Williams (Australian footballer, born 1944), VFL footballer for Fitzroy •
Peter Williams (Australian footballer, born 1957), VFL footballer for Richmond
Cricket •
Peter Williams (Irish cricketer) (1897–1971), Irish cricketer for Sussex and several other teams in England •
Peter Williams (Australian cricketer) (born 1942), Australian cricketer, played for Victoria •
Peter Williams (South African cricketer) (1957–2014), South African cricketer
Other sports •
Peter Williams (rugby union, born 1884) (1884–1976), New Zealand rugby union international footballer •
Peter Williams (English footballer) (1931–2021), English footballer •
Peter Williams (motorcyclist) (1939–2020), British motorcycle racer, participant in the Isle of Man TT, 1967 •
Peter Williams (rugby, born 1958), English rugby union and rugby league footballer •
Pete Williams (basketball) (born 1965), American professional basketball player •
Peter Williams (footballer, born 1960), Welsh association footballer •
Peter Williams (swimmer) (born 1968), South African swimmer •
Pete Williams (fighter) (born 1975), American mixed martial arts fighter •
Petey Williams (born 1981), Canadian professional wrestler •
Peter Williams (alpine skier) (born 1983), New Zealand para-alpine sit-skier •
Peter Williams (cyclist) (born 1986), British racing cyclist •
Pete Williams (footballer) (born 1954), Welsh football goalkeeping coach and player ==Others==