| distance | reference number | name | latitude | longitude |
| 4.0 | 35 | Alexandria, Virginia | 38.8 | -77.0333 |
| 4.0 | 59 | Anacostia Bridge, Anacostia River, Washington, D.C. | 38.8667 | -77 |
| 4.2 | 222 | Bellevue, Washington, D.C. | 38.8333 | -77.0333 |
| 4.6 | 2509 | Reagan National Airport, Washington, D.C. | 38.85 | -77.0333 |
| 5.0 | 3268 | Washington, Potomac River, D.C. | 38.8733 | -77.0217 |
| 5.5 | 233 | Benning Bridge, Anacostia River, Washington, D.C. | 38.9 | -76.9667 |
| 6.8 | 1041 | Fort Washington, Maryland | 38.7167 | -77.0333 |
| 6.8 | 2553 | Riverview, Maryland | 38.7167 | -77.0333 |
| 7.7 | 273 | Bladensburg, Anacostia River, Maryland | 38.9333 | -76.9383 |
| 8.1 | 1495 | Key Bridge, Washington, D.C. | 38.9 | -77.0667 |
| 9.5 | 1903 | Mount Vernon, Virginia | 38.7 | -77.0833 |
| 10.2 | 502 | Chain Bridge, one mile below, Washington, D.C. | 38.9167 | -77.1 |
| 10.9 | 1767 | Marshall Hall, Maryland | 38.6833 | -77.1 |
| 11.6 | 503 | Chain Bridge, Washington, D.C. | 38.9333 | -77.1167 |
| 13.1 | 1183 | Gunston Cove, Virginia | 38.6667 | -77.1333 |
| 15.1 | 1271 | Hills Bridge (Route 4), Maryland | 38.8 | -76.7167 |
| 15.2 | 1114 | Glymont, Maryland | 38.6167 | -77.1333 |
| 17.0 | 2059 | Nottingham, Patuxent River, Maryland | 38.7167 | -76.7 |
| 18.0 | 1377 | Indian Head, Maryland | 38.6 | -77.1833 |
| 18.1 | 1266 | High Point, Occoquan Bay, Virginia | 38.6167 | -77.2 |
| 19.4 | 1707 | Lower Marlboro, Patuxent River, Maryland | 38.655 | -76.6833 |
| 19.6 | 1706 | Lower Marlboro, Maryland | 38.65 | -76.6833 |
| 20.8 | 750 | Deep Point, Mattawoman Creek, Maryland | 38.5667 | -77.2167 |
| 22.1 | 1124 | Goose Bay, Port Tobacco River, Maryland | 38.45 | -77.05 |
| 25.0 | 1782 | Mathias Point, Virginia | 38.4 | -77.05 |