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Traveling on Interstate 66? Check the list below.
| Exit Number | Intersects | Names | City / County | 
| 1 | Interstate 81 | I-66 east to Washington, D.C. | Frederick County | 
| 6 | Routes 340 / 522 | Front Royal / Inland port | Warren County | 
| 13 | Route 79 | Linden | Warren County | 
| 18 | Route 688 | Fauquier County | |
| 23 | Routes 17 / 55 | Fauquier County | |
| 27 | Routes 17 / 55 / 721 | Fauquier County | |
| 28 | Route 17 | Fauquier County | |
| 31 | Route 245 | Fauquier County | |
| 40 | Route 15 | Prince William County | |
| 43 | Route 29 | Prince William County | |
| 44 | Route 234 | Prince William County | |
| 47 | Route 234 | Prince William County | |
| 52 | Route 29 / Lee Highway | Fairfax County | |
| 53 | Route 28 / Sully Road | Fairfax County | |
| 55 | Fairfax County Parkway | Fairfax County | |
| 57 | Route 50 / Lee Jackson Memorial Highway | Fairfax County | |
| 60 | Route 123 / Chain Bridge Road | Fairfax County | |
| 62 | Route 243 / Nutley Street | Fairfax County | |
| 64 | Interstate 495 | Fairfax County | |
| 66 | Route 7 / Leesburg Pike | Fairfax County | |
| 67 | Dulles Access Road | Fairfax County | |
| 68 | Westmoreland Street | Arlington County | |
| 69 | Sycamore Street | Arlington County | |
| 71 | Route 120 / 337 Glebe Road / Fairfax Drive | Arlington County | |
| 72 | Route 29 / Lee Highway | Arlington County | |
| 73 | Route 29 / Lee Highway | Arlington County | |
| 75 | Route 50 / Arlington Boulevard | Arlington County |