Oliver Newton "Jim" Clayton (13 April 1911 – 9 June 1992) was a New Zealand rower.
At the 1938 British Empire Games he won the silver medal as part of the men's coxed four as their stroke.
He was a member of the Petone Rowing Club, and his team members in the 1938 boat were Albert Hope, Kenneth Boswell, John Rigby, and George Burns (cox).