John Wesley Widdifield (March 16, 1869 – October 14, 1943) was an Ontario political figure.
He represented Ontario North as a Liberal member from 1919 to 1929.
He was born in Uxbridge Township, the son of Warren Playter Widdifield.
He was educated in Uxbridge and at the Ontario Agricultural College in Guelph, later receiving a degree from Toronto University.
He died in 1943 when he was stricken while he was driving to the funeral of a friend at his hometown of Uxbridge.