Virginia State Route 721
State Route 721 in the U.S. state of Virginia is a secondary route designation applied to multiple discontinuous road segments among the many counties. The list below describes the sections in each county that are designated SR 721.
List
| County | Length | Length | From | Via | To | Notes |
| Accomack | SR 632 | Unnamed road | Dead End | - | ||
| Albemarle | SR 6 | Old Dominion Road | SR 630 | - | ||
| Alleghany | SR 687 | Unnamed road | SR 687 | Gap between SR 695 and a dead end | - | |
| Amherst | Dead End | Ann Street | US 29 Bus | - | ||
| Augusta | Dead End | Eagle Rock Lane Hundley Mill Road | Dead End | Gap between segments ending at different points along US 250 | - | |
| Bedford | SR 122 | Wells Road | SR 722 | - | ||
| Botetourt | US 11 | Darby Road | US 11 | - | ||
| Campbell | SR 646 | Pilot View Road | Dead End | - | ||
| Carroll | SR 606 | Fries Road Cliffview Road | Galax city limits | Gap between segments ending at different points along SR 607 | - | |
| Chesterfield | Dead End | Penmar Drive | SR 36 | - | ||
| Dinwiddie | US 460/FR-804 | Pine Hill Road | Dead End | - | ||
| Fairfax | SR 242 | Pohick Bay Drive | Cul-de-Sac | - | ||
| Fauquier | SR 738 | Free State Road | I-66/US 17 Bus/SR 55 | - | ||
| Franklin | SR 707 | Patti Road | SR 718 | - | ||
| Frederick | US 522 | Purcell Lane | Dead End | - | ||
| Halifax | US 360 | Piney Creek Road Ashe Cake Creek Road | SR 716 | - | ||
| Hanover | SR 620 | Watkins Road | Dead End | - | ||
| Henry | Dead End | DuPont Road | US 58 | - | ||
| James City | SR 614 | Settlers Lane | Cul-de-Sac | - | ||
| Loudoun | SR 726 | Crooked Run Lane | Dead End | - | ||
| Louisa | Dead End | Watkins Lane | SR 688 | - | ||
| Mecklenburg | Dead End | State Line Road | SR 822 | - | ||
| Montgomery | Dead End | Mash Run | SR 655 | - | ||
| Pittsylvania | US 29 Bus | Livestock Road | SR 719 | - | ||
| Prince George | SR 630 | Mica Drive | Dead End | - | ||
| Prince William | US 1 | Anderson Road | SR 722 | - | ||
| Pulaski | SR 693 | Webb Road | Dead End | - | ||
| Roanoke | SR 666 | Ferguson Valley Road | Dead End | - | ||
| Rockbridge | SR 717 | Finley Road | SR 606 | - | ||
| Rockingham | SR 613 | Green Hill Road Linville Edom Road Longs Pump Road Fellowship Road | SR 717 | Gap between segments ending at different points along SR 42 Gap between segments ending at different points along SR 753 Gap between segments ending at different points along US 11 | - | |
| Scott | SR 694 | Indian Creek Lane | Dead End | - | ||
| Shenandoah | SR 263 | Kelly Road | SR 711 | - | ||
| Spotsylvania | SR 601 | Grand Brooks Road | SR 612 | - | ||
| Stafford | SR 687 | Old Concord Road | Dead End | - | ||
| Tazewell | Dead End | Teri Road | SR 643 | - | ||
| Washington | SR 91 | Limestone Road | Dead End | Gap between segments ending at different points along SR 722 | - | |
| Wise | US 23 Bus | Highland Drive | Dead End | - | ||
| York | SR 720 | Berkley Drive | SR 722 | - |