Job Dean Jessop (December 4, 1926 - January 30, 2001) was an American National Champion Thoroughbred racing jockey.

Born in Logan, Utah, Jessop was eighteen when on August 9, 1944, as an apprentice jockey he won six races in one program at Ellis Park Racecourse in Henderson, Kentucky.

His accomplishment was most impressive as a result of government wartime restrictions which had limited the racing year to approximately seven and one-half months.

Guiding the great Hall of Fame mare Gallorette, he won the Queens County Handicap against male horses in 1947.

Jessop retired from riding in 1970 and settled in Texas where for a short time he was involved with training horses.