| Teams for 1971 Islip 250 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 4 | John Sears | John Sears |  |
| 06 | Castles Racing | Frog Fagan | |
| 6 | Castles Racing | Neil Castles | |
| 8 | Negre Racing | Ed Negre |  |
| 10 | Champion Racing | Bill Champion | |
| 12 | Holman-Moody Racing | Bobby Allison |  |
| 19 | Henley Gray Racing | Henley Gray | |
| 23 | Robertson Racing | Jabe Thomas |  |
| 24 | Gordon Racing | Cecil Gordon | |
| 25 | Robertson Racing | James Cox | |
| 28 | Earl Brooks | Bill Hollar | |
| 30 | Ballard Racing | Walter Ballard | |
| 34 | Scott Racing | Wendell Scott | |
| 39 | Friday Hassler | Friday Hassler |  |
| 40 | Ulrich Racing | D.K. Ulrich | |
| 41 | Ken Meisenhelder | Ken Meisenhelder | |
| 43 | Petty Enterprises | Richard Petty | |
| 45 | Siefert Racing | Bill Seifert | |
| 48 | Hylton Engineering | James Hylton | |
| 49 | GC Spencer Racing | G.C. Spencer | |
| 62 | K-Automotive Motorsports | Bennis Listman | |
| 64 | Langley Racing | Dick May | |
| 67 | Ron Ronacher | Elmo Langley | |
| 68 | Allan Schlauer | Larry Baumel | |
| 70 | McDuffie Racing | J.D. McDuffie | |
| 73 | Churchill Motorsports | Jerry Churchill | |
| 74 | Shirey Racing | Bill Shirey | |
| 77 | Charlie Roberts | Charlie Roberts | |
| 79 | Warren Racing | Frank Warren | |
| 86 | Castles Racing | Bobby Mausgrover | |
| 89 | Wiltshire Racing | George Wiltshire | |
| 91 | Junior Fields | Pete Hamilton | |
| 96 | Garn Racing | Richard Childress | |
