| Teams 1966 Maryland 200 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 0 | Clyde Lynn | Jimmy Helms | Ford |
| 2 | Donald Brackens | Bobby Allison | Chevrolet |
| 4 | DeWitt Racing | John Sears | Ford |
| 20 | Clyde Lynn | Clyde Lynn | Ford |
| 34 | Scott Racing | Wendell Scott | Ford |
| 42 | Petty Enterprises | Richard Petty | Plymouth |
| 48 | Bud Hartje | James Hylton | Dodge |
| 50 | Edgard Wallen | Edgar Wallen | Chevrolet |
| 55 | Lyle Stelter | Tiny Lund | Ford |
| 61 | Toy Bolton | Joel Davis | Chevrolet |
| 63 | Bob Adams | Larry Manning | Plymouth |
| 64 | Elmo Langley & Henry Woodfield | Elmo Langley | Ford |
| 65 | Arrington Racing | Buddy Arrington | Dodge |
| 70 | McDuffie Racing | J.D. McDuffie | Ford |
| 73 | Joan Petre | Buddy Baker | Ford |
| 75 | Gene Black | Earl Brooks | Ford |
| 87 | Buck Baker Racing | Buck Baker | Oldsmobile |
| 92 | W.S. Jenkins | Hank Thomas | Ford |
| 93 | Harry Neal | Blackie Watt | Ford |
| 94 | Ron Stotten | Don Biederman | Chevrolet |
| 95 | Siefert Racing | Bill Seifert | Ford |
| 97 | Henley Gray Racing | Henley Gray | Ford |