Sportsmen
- John Parker (West Indian cricketer) (1871–1946)
- John Parker (water polo) (born 1946), American water polo player
- John Parker (cricketer, born 1951), New Zealand test cricketer
- John Willie Parker, English former professional footballer
- John Parker (Australian footballer) (born 1971), former Australian rules footballer
- John Parker (cricketer, born 1902) (1902–1984), English cricketer
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