Sportsmen
- John Morgan (footballer born 1855) (1855–1937), Cambridge University A.F.C. and Wales international footballer
- John Morgan (footballer born 1876) (1876–?), Wrexham A.F.C. and Wales international footballer
- Jock Morgan (1889–1983), Scottish footballer
- John Morgan (born 1977), American writer, mixed martial artist and journalist
- John Morgan (sailor) (born 1930), American Olympic medalist
- John Morgan (golfer) (1943–2006), English professional golfer who competed on the European Tour in the 1970s and 80s
- John E. Morgan (born 1977), English professional golfer
- John Morgan (cricketer) (born 1977), former English cricketer
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