Kenneth James Rymill (30 August 1906 – 31 May 1977) was an English cricketer. Rymill was a right-handed batsman. He was born at Northampton, Northamptonshire.
Rymill made his first-class debut for Northamptonshire against Dublin University in 1926 at the County Ground, Northampton. His next first-class appearance for the county came in 1932, against Somerset in the County Championship. He made two further first-class appearances in that season's County Championship, against Kent and Gloucestershire. In his four first-class matches for the county, he scored just 35 runs at an average of 5.83, with a high score of 28.
He died at the town of his birth on 31 May 1977.