# List of U.S. Highways in Maryland

The following is a list of U.S. Highways in Maryland. There are currently 14 U.S. Highways that exist entirely or partially in the U.S. state of Maryland. Seven of these are primary U.S. Highways while seven are auxiliary U.S. Highways that may or may not be related to one of the primary U.S. Highways. The longest primary U.S. Highway in Maryland is U.S. Route 40 (commonly abbreviated US 40) at 221.31 miles (356.16 km). The shortest primary U.S. Highway in Maryland is US 11 at 12.83 miles (20.65 km). The longest auxiliary U.S. Highway in Maryland is US 301 at 123.30 miles (198.43 km). The shortest auxiliary U.S. Highway in Maryland is US 522 at 2.37 miles (3.81 km). All U.S. Highways are maintained by the Maryland State Highway Administration except for the portions that run through Baltimore, Hagerstown, and Cumberland. Maryland has five former U.S. Highways; those five are shaded in dark gray in the list.

## Mainline routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| US 1 | 80.25 | 129.15 | US 1 in Washington, D.C. | US 1 at the Pennsylvania state line near Rising Sun | 01926-01-011926 | current | |
| US 11 | 12.83 | 20.65 | US 11 at the West Virginia state line in Williamsport | US 11 at the Pennsylvania state line near Hagerstown | 01926-01-011926 | current | |
| US 13 | 42.48 | 68.36 | US 13 at the Virginia state line near Pocomoke City | US 13 at the Delaware state line in Delmar | 01926-01-011926 | current | |
| US 15 | 37.85 | 60.91 | US 15 at the Virginia state line at Point of Rocks | US 15 at the Pennsylvania state line near Emmitsburg | 01927-01-011927 | current | |
| US 29 | 29.51 | 47.49 | US 29 in Washington, D.C. | MD 99 in Ellicott City | 01934-01-011934 | current | |
| US 40 | 221.31 | 356.16 | US 40 at the Pennsylvania state line near Keysers Ridge | US 40 at the Delaware state line in Elkton | 01926-01-011926 | current | |
| US 48 | 81.09 | 130.50 | US 48 at the West Virginia state line near Friendsville | I-70 / US 40 / US 522 in Hancock | 01974-01-011974 | 01991-01-011991 | Replaced by I-68 |
| US 50 | 150.06 | 241.50 | US 50 at the West Virginia state line near RedhouseUS 50 in Washington, D.C. | US 50 at the West Virginia state line near GormanMD 378 / MD 528 in Ocean City | 01926-01-011926 | current | Two segments; length is sum of segments |
| US 111 | 32.24 | 51.89 | US 1 in Baltimore | US 111 at the Pennsylvania state line at Maryland Line | 01926-01-011926 | 01963-01-011963 | Replaced by MD 45, I-695, and I-83 |
| US 113 | 37.84 | 60.90 | US 13 in Pocomoke City | US 113 at the Delaware state line at Bishop | 01926-01-011926 | current | |
| US 140 | 38.50 | 61.96 | US 1 in Baltimore | US 140 at the Pennsylvania state line near Littlestown, PA | 01926-01-011926 | 01979-01-011979 | Replaced by MD 140 and MD 97 |
| US 213 | 58.27 | 93.78 | US 50 in Wye Mills | US 40 in Elkton | 01926-01-011926 | 01972-01-011972 | Replaced by MD 213 |
| US 219 | 48.40 | 77.89 | US 219 at the West Virginia state line near Redhouse | US 219 at the Pennsylvania state line near Grantsville | 01926-01-011926 | current | |
| US 220 | 27.35 | 44.02 | US 220 at the West Virginia state line in McCoole | US 220 at the Pennsylvania state line near Dickens | 01926-01-011926 | current | |
| US 222 | 3.60 | 5.79 | US 1 at Conowingo | US 222 at the Pennsylvania state line near Conowingo | 01930-01-011930 | current | |
| US 240 | 36.75 | 59.14 | US 240 in Washington, D.C. | I-70 / US 40 in Frederick | 01926-01-011926 | 01973-01-011973 | Replaced by MD 355 and I-270 |
| US 301 | 122.85 | 197.71 | US 301 at the Virginia state line near Newburg | US 301 at the Delaware state line near Warwick | 01939-01-011939 | current | |
| US 340 | 16.99 | 27.34 | US 340 at the Virginia state line near Harpers Ferry, WV | US 15 / US 40 in Frederick | 01926-01-011926 | current | |
| US 522 | 2.37 | 3.81 | US 522 at the West Virginia state line in Hancock | I-70 / US 522 at the Pennsylvania state line in Hancock | 01930-01-011930 | current | |

## Special routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| US 1 Alt. | 2.09 | 3.36 | US 1 Alternate in Washington, D.C. | US 1 in Hyattsville | 01946-01-011946 | current | Alternate route via Bladensburg |
| US 1 Alt. | 3.92 | 6.31 | US 1 in Arbutus | US 1 in Baltimore | 01949-01-011949 | current | Alternate route via Halethorpe |
| US 1 Bus. | 6.90 | 11.10 | US 1 / MD 147 at Benson | US 1 in Hickory | 01966-01-011966 | current | Business route through Bel Air |
| US 13 Bus. | 2.48 | 3.99 | US 13 in Pocomoke City | US 13 / MD 364 in West Pocomoke | 01994-01-011994 | current | Business route through Pocomoke City |
| US 13 Bus. | 8.14 | 13.10 | US 13 near Fruitland | US 13 / US 50 in Salisbury | 01983-01-011983 | current | Business route through Fruitland and Salisbury |
| US 15 Bus. | 2.34 | 3.77 | US 15 near Emmitsburg | US 15 in Emmitsburg | 01967-01-011967 | current | Business route through Emmitsburg |
| US 40 Alt. | 31.80 | 51.18 | US 40 at Keyser's Ridge | I-68 / US 40 / US 220 / MD 639 in Cumberland | 01983-01-011983 | current | Alternate route via Grantsville and Frostburg |
| US 40 Alt. | 22.97 | 36.97 | Potomac Street in Hagerstown | US 40 in Frederick | 01952-01-011952 | current | Alternate route via Boonsboro and Middletown |
| US 40 Scenic | 9.50 | 15.29 | Fifteen Mile Creek Road in Green Ridge State Forest | I-68 / US 40 near Hancock | 01965-01-011965 | current | Scenic route across Town Hill and Sideling Hill; length only includes state-maintained section in Allegany County |
| US 50 Bus. | 6.88 | 11.07 | US 50 near Salisbury | US 13 / US 50 in Salisbury | 02002-01-012002 | current | Business route through Salisbury |
| US 113 Bus. | 2.48 | 3.99 | US 113 near Snow Hill | US 113 in Snow Hill | 01997-01-011997 | current | Business route through Snow Hill |