| No | Entrant | Races | Active Years |
|---|
| 441 | J. Ensley & S. Murphy (Indy only) | 1 |
1960 |
| 442 | J. Frank Harrison | 1 |
1961 |
| 443 | J. Heath (Non-champ only) | 1 |
1953 |
| 444 | J. Wheeler Autosport | 1 |
1961 |
| 445 | J.A. Pearce Engineering | 2 |
1966 |
| 446 | J.B. Naylor | 9 |
1956–1961 |
| 447 | J.C. Agajanian (Indy only) | 8 |
1950–1956, 1960 |
| 448 | J.C. Brierley (Non-champ only) | 1 |
1955 |
| 449 | J.E. Byrnes (Non-champ only) | 3 |
1956 |
| 450 | J.K. Hall (Non-champ only) | 2 |
1956 |
| 451 | J.S. Belond (Indy only) | 1 |
1953 |
| 452 | J.S. Donaldson (Indy only) | 4 |
1957–1960 |
| 453 | Jack B. Hinkle (Indy only) | 6 |
1950–1955 |
| 454 | Jack Brabham | 8 |
1955–1956 |
| 455 | Jack Holme | 1 |
1969 |
| 456 | Jack Richards (Non-champ only) | 5 |
1956 |
| 457 | Jack Walton (Non-champ only) | 4 |
1954–1955 |
| 458 | Jackie Pretorius | 1 |
1965 |
| 459 | Jacques Swaters (Non-champ only) | 1 |
1954 |
| 460 | Jaguar Racing | 85 |
2000–2004 |
| 461 | Jean Behra | 1 |
1959 |
| 462 | Jean Lucas (Non-champ only) | 1 |
1955 |
| 463 | Jean Lucienbonnet | 1 |
1959 |
| 464 | Jean Marcenac (Indy only) | 2 |
1951, 1953 |
| 465 | Jean Thepenier (Non-champ only) | 1 |
1954 |
| 466 | Jean-Claude Vidille (Non-champ only) | 1 |
1955 |
| 467 | Jim Hall | 3 |
1960–1962 |
| 468 | Jim Kelly (Non-champ only) | 10 |
1976–1977 |
| 469 | Jim Robbins (Indy only) | 8 |
1951–1952, 1954–1956, 1958–1960 |
| 470 | Jim Russell (Non-champ only) | 1 |
1956 |
| 471 | Jo Bonnier | 10 |
1957–1958 |
| 472 | Jo Siffert Automobiles | 2 |
1971 |
| 473 | Joakim Bonnier Racing Team | 17 |
1967–1968 |
| 474 | Joe Fry | 1 |
1950 |
| 475 | Joe Hunt (Indy only) | 1 |
1960 |
| 476 | Joe Kelly | 2 |
1950–1951 |
| 477 | Joe Langley (Indy only) | 1 |
1950 |
| 478 | Joe Lubin | 1 |
1960 |
| 479 | John Bowtell (Non-champ only) | 5 |
1976–1977 |
| 480 | John Brown Wheels (Non-champ only) | 2 |
1977 |
| 481 | John Coombs (Non-champ only) | 6 |
1954–1956 |
| 482 | John Dalton | 2 |
1962 |
| 483 | John Fisher | 3 |
1956, 1959 |
| 484 | John Goldie Racing with Hexagon | 9 |
1974 |
| 485 | John H. Webb (Non-champ only) | 12 |
1954–1955 |
| 486 | John James | 1 |
1951 |
| 487 | John Jordan (Non-champ only) | 10 |
1977 |
| 488 | John L. McDaniel (Indy only) | 3 |
1951, 1953, 1955 |
| 489 | John Lorenz (Indy only) | 1 |
1950 |
| 490 | John Love | 5 |
1962–1963, 1965, 1967–1968 |
| 491 | John M. Wyatt III | 1 |
1961 |
| 492 | John Maryon | 1 |
1969 |
| 493 | John Mecom | 1 |
1962 |
| 494 | John Player Special Team Lotus | 32 |
1985–1986 |
| 495 | John Player Team Lotus | 164 |
1972–1978, 1981–1984 |
| 496 | John R. Wills (Indy only) | 1 |
1959 |
| 497 | John Ravenscroft (Non-champ only) | 4 |
1977 |
| 498 | John Riseley-Prichard (Non-champ only) | 4 |
1954 |
| 499 | John Surtees Garages (Non-champ only) | 1 |
1979 |
| 500 | John Tait (Non-champ only) | 6 |
1976–1977 |
| 501 | John Willment Automobiles | 8 |
1964–1965 |
| 502 | John Young (Non-champ only) | 5 |
1955–1956 |
| 503 | John Zink (Indy only) | 9 |
1952–1960 |
| 504 | Jolly Club of Switzerland | 1 |
1977 |
| 505 | Jolly Club SpA | 3 |
1976, 1986 |
| 506 | Jolly Club Switzerland | 1 |
1971 |
| 507 | Jordan Ford | 34 |
2003–2004 |
| 508 | Jordan Grand Prix | 19 |
2005 |
| 509 | Jorge Daponte | 4 |
1954 |
| 510 | Josef Peters | 1 |
1952 |
| 511 | Joseph Massaglia Jr (Indy only) | 4 |
1955–1958 |
| 512 | José Froilan González | 1 |
1951 |
| 513 | Juan Manuel Fangio | 1 |
1958 |
