| Jim Nazworthy | |
| Occupation: | Trainer |
| Birth Place: | United States  |
| Birth Date: | September 3, 1926 |
| Death Date: | February 21, 1974 (aged 47) |
| Career Wins: | 231 |
| Race: | San Pasqual Handicap (1960) Hollywood Gold Cup (1961) Del Mar Handicap (1963, 1964) Arcadia Handicap (1964) Longacres Mile (1964) San Juan Capistrano Handicap (1964) San Marcos Stakes (1964) Santa Anita Handicap (1964) Bing Crosby Handicap (1965) Carter Handicap (1965) San Bernardino Handicap (1968) Del Mar Debutante Stakes (1969) Santa Paula Stakes (1971) Monrovia Handicap (1971) Graduation Stakes (1972) |
| Horses: | Fleet Nasrullah, Prince Blessed Viking Spirit, Mr. Consistency |
James I. Nazworthy (September 3, 1926 - February 21, 1974) was an American Thoroughbred horse racing trainer.
Nazworthy began training horses at age twenty-one. Based in California, among his successful runners, he conditioned horses for owners such as Fannie Hertz, Travis Kerr, as well for his wife's Sledge Stable. https://web.archive.org/web/20071012032422/http://www.ntra.com/stats_bios.aspx?id=3650
He died in 1974 of a heart attack at age forty-seven. The Los Angeles Times February 23, 1974 obituary called Nazworthy "one of California's foremost trainers."
A resident of Arcadia, California, he was survived by his wife, Maxine, a daughter of Sidney B. Factor, and their son, David.