John Maddocks
| Personal information | |
|---|---|
| Full name | John Henry Maddocks | 
| Nationality | British | 
| Born | 7 January 1958 Reading, England  | 
| Sailing career | |
| Class | Star | 
John Henry Maddocks (born 7 January 1958) is a British sailor. He competed in the Star event at the 1984 Summer Olympics together with Iain Woolward and finished 9th.
Maddocks was born in Reading.