List of Maryland state highways (400–599)

Route	Starting point	Ending point	Length (mi)	Length (km)	Notes
402.3 Maryland Route 402	MD 2 / MD 4 in Prince Frederick	Dares Beach	A10004.33 !4.33	A10,006.97} !6.97
404.3 Maryland Route 404	MD 662 in Wye Mills	DE 404 near Andersontown	A10024.61 !24.61	A10,039.61} !39.61
405.3 Maryland Route 405	MD 304 near Ruthsburg	MD 19 near Church Hill	A10008.59 !8.59	A10,013.82} !13.82
406.3 Maryland Route 406	Hudson's Corner	West Pocomoke
407.3 Maryland Route 407	MD 31 near Marston	MD 27 near Dennings	A10003.81 !3.81	A10,006.13} !6.13
408.3 Maryland Route 408	MD 4 in Waysons Corner	MD 2 / MD 422 in Lothian	A10005.62 !5.62	A10,009.04} !9.04
410.3 Maryland Route 410	MD 355 in Bethesda	Pennsy Drive near Glenarden	A10013.92 !13.92	A10,022.40} !22.40
413.3 Maryland Route 413	Crisfield	US 13 near Westover	A10014.61 !14.61	A10,023.51} !23.51
414.3 Maryland Route 414	Oxon Hill	MD 5 in Silver Hill	A10005.11 !5.11	A10,008.22} !8.22
418.3 Maryland Route 418	MD 60 in Leitersburg	Pennsylvania state line near Ringgold	A10004.62 !4.62	A10,007.44} !7.44
422.3 Maryland Route 422	Bayard	MD 2 / MD 408 in Lothian	A10003.04 !3.04	A10,004.89} !4.89
423.3 Maryland Route 423	MD 2 near Tracys Landing	Fairhaven	A10002.79 !2.79	A10,004.49} !4.49
424.3 Maryland Route 424	MD 214 in Davidsonville	MD 3 in Crofton	A10008.24 !8.24	A10,013.26} !13.26
425.3 Maryland Route 425	MD 6 near Nanjemoy	MD 224 near Potomac Heights	A10011.77 !11.77	A10,018.94} !18.94
432.3 Maryland Route 432	Guilford Road in Columbia	Cul-de-sac in Columbia	A10000.25 !0.25	A10,000.40} !0.40
435.3 Maryland Route 435	MD 450 in Annapolis	MD 450 in Annapolis	A10001.16 !1.16	A10,001.87} !1.87
436.3 Maryland Route 436	MD 435 in Annapolis	Bestgate Road in Annapolis	A10001.14 !1.14	A10,001.83} !1.83
439.3 Maryland Route 439	MD 45 near Maryland Lane	MD 23 in Shawsville	A10007.19 !7.19	A10,011.57} !11.57
440.3 Maryland Route 440	MD 543 in Ady	MD 440 near Dublin	A10005.65 !5.65	A10,009.09} !9.09
443.3 Maryland Route 443	Betterton
444.3 Maryland Route 444	MD 290 in Chesterville	Kentmore Park	A10007.29 !7.29	A10,011.73} !11.73
445.3 Maryland Route 445	Eastern Neck National Wildlife Refuge	MD 21 in Tolchester Beach	A10011.96 !11.96	A10,019.25} !19.25
446.3 Maryland Route 446	Broad Neck	MD 20 near Chestertown	A10006.03 !6.03	A10,009.70} !9.70
448.3 Maryland Route 448	Kennedyville
449.3 Maryland Route 449	MD 213 in Locust Grove	MD 444 in Locust Grove	A10000.07 !0.07	A10,000.11} !0.11
450.3 Maryland Route 450	US 1 Alt. in Bladensburg	US 50 / US 301 / MD 2 near Annapolis	A10030.42 !30.42	A10,048.96} !48.96
451.3 Maryland Route 451	Claiborne
452.3 Maryland Route 452	US 50 near Berlin	MD 575 in Friendship	A10001.64 !1.64	A10,002.64} !2.64
454.3 Maryland Route 454	DE 8 in Marydel	MD 302 in Templeville	A10002.21 !2.21	A10,003.56} !3.56
456.3 Maryland Route 456	US 50 near Queenstown	MD 18 in Queenstown	A10001.22 !1.22	A10,001.96} !1.96
458.3 Maryland Route 458	MD 5 in Hillcrest Heights	Walker Mill Road in District Heights	A10003.12 !3.12	A10,005.02} !5.02
459.3 Maryland Route 459	US 50 in Cheverly	MD 201 in Cheverly	A10001.25 !1.25	A10,002.01} !2.01
460.3 Maryland Route 460	Crisfield	MD 413 in Crisfield	A10000.78 !0.78	A10,001.26} !1.26
462.3 Maryland Route 462	MD 132 in Aberdeen	MD 155 near Havre de Grace	A10004.15 !4.15	A10,006.68} !6.68
464.3 Maryland Route 464	MD 17 / MD 79 in Rosemont	Ballenger Creek Road in Point of Rocks	A10008.1 !8.10	A10,013.04} !13.04
468.3 Maryland Route 468	Shady Side	MD 214 in Edgewater	A10011.19 !11.19	A10,018.01} !18.01
470.3 Maryland Route 470	MD 242 in Avenue	MD 242 in Dynard	A10003.75 !3.75	A10,006.04} !6.04
471.3 Maryland Route 471	MD 5 in Great Mills	Great Mills	A10000.99 !0.99	A10,001.59} !1.59
472.3 Maryland Route 472	MD 235 in Oakville	Sandgates	A10002.58 !2.58	A10,004.15} !4.15
475.3 Maryland Route 475	South Street in Frederick	MD 144 in Frederick	A10000.26 !0.26	A10,000.42} !0.42
478.3 Maryland Route 478	MD 180 in Knoxville	Brunswick	A10001.88 !1.88	A10,003.03} !3.03
479.3 Maryland Route 479	Cambridge
480.3 Maryland Route 480	MD 404 in Hillsboro	MD 313 in Greensboro	A10009.08 !9.08	A10,014.61} !14.61
481.3 Maryland Route 481	MD 309 near Queen Anne	MD 304 in Ruthsburg	A10005.13 !5.13	A10,008.26} !8.26
482.3 Maryland Route 482	MD 27 in Mexico	MD 30 Bus. in Hampstead	A10005.41 !5.41	A10,008.71} !8.71
485.3 Maryland Route 485	MD 404 near Hillsboro	MD 404 near Hillsboro	A10000.65 !0.65	A10,001.05} !1.05
488.3 Maryland Route 488	MD 6 in La Plata	MD 5 in Bryantown	A10006.01 !6.01	A10,009.67} !9.67
489.3 Maryland Route 489	MD 5 in Park Hall	MD 235 in Park Hall	A10001.27 !1.27	A10,002.04} !2.04
490.3 Maryland Route 490	Commerce Street in Havre de Grace	MD 7 in Havre de Grace	A10000.31 !0.31	A10,000.50} !0.50
491.3 Maryland Route 491	MD 64 in Smithsburg	MD 550 in Fort Ritchie	A10006.78 !6.78	A10,010.91} !10.91
494.3 Maryland Route 494	PA 75 near Fairview	MD 63 in Cearfoss	A10006.82 !6.82	A10,010.98} !10.98
495.3 Maryland Route 495	MD 135 in Altamont	US 40 Alt. in Grantsville	A10023.02 !23.02	A10,037.05} !37.05
496.3 Maryland Route 496	MD 97 near Westminster	MD 30 near Manchester	A10007.23 !7.23	A10,011.64} !11.64
497.3 Maryland Route 497	MD 2 / MD 4 in Lusby	Cove Point	A10002.68 !2.68	A10,004.31} !4.31
500.3 Maryland Route 500	Michigan Avenue in Washington, D.C.	MD 410 in Hyattsville	A10002.22 !2.22	A10,003.57} !3.57
501.3 Maryland Route 501	MD 212 in Chillum	MD 500 in Hyattsville	A10001.68 !1.68	A10,002.70} !2.70
506.3 Maryland Route 506	MD 508 in Bowens	MD 2 / MD 4 near Port Republic	A10003.79 !3.79	A10,006.10} !6.10
508.3 Maryland Route 508	MD 506 in Bowens	MD 231 near Barstow	A10001.2 !1.20	A10,001.93} !1.93
509.3 Maryland Route 509	MD 765 in Port Republic	Kenwood Beach	A10000.95 !0.95	A10,001.53} !1.53
513.3 Maryland Route 513	US 13 Bus. in Fruitland	US 13 near Fruitland	A10001.77 !1.77	A10,002.85} !2.85
514.3 Maryland Route 514	MD 20 in Chestertown	MD 298 in Melitota	A10004.89 !4.89	A10,007.87} !7.87
518.3 Maryland Route 518	MD 404 Alt. in Queen Anne	Talbot/Queen Anne's county line in Queen Anne	A10000.06 !0.06	A10,000.10} !0.10
519.3 Maryland Route 519	Worthington
521.3 Maryland Route 521	Lowery Road near Huntingtown	MD 524 in Huntingtown	A10002.61 !2.61	A10,004.20} !4.20
524.3 Maryland Route 524	MD 2 / MD 4 in Huntingtown	MD 2 / MD 4 in Huntingtown	A10000.76 !0.76	A10,001.22} !1.22
528.3 Maryland Route 528	US 50 in Ocean City	DE 1 in Ocean City	A10009.04 !9.04	A10,014.55} !14.55
529.3 Maryland Route 529	MD 675 in Princess Anne	US 13 near Mount Vernon	A10002.57 !2.57	A10,004.14} !4.14
533.3 Maryland Route 533	Cobb Island
535.3 Maryland Route 535	MD 5 in Temple Hills	I-95 / I-495 in Temple Hills	A10000.16 !0.16	A10,000.26} !0.26
537.3 Maryland Route 537	Segments of old alignment of MD 213 in Chesapeake City		A10000.8 !0.80	A10,001.29} !1.29	Multiple segments
542.3 Maryland Route 542	MD 147 in Baltimore	I-695 in Parkville	A10006.33 !6.33	A10,010.19} !10.19
543.3 Maryland Route 543	US 40 in Riverside	MD 165 in Pylesville	A10019.08 !19.08	A10,030.71} !30.71
544.3 Maryland Route 544	MD 213 in Kingstown	MD 313 near Unicorn	A10009.48 !9.48	A10,015.26} !15.26
545.3 Maryland Route 545	MD 213 in Elkton	Warburton Road in Cedar Hill	A10005.92 !5.92	A10,009.53} !9.53
546.3 Maryland Route 546	I-68 in Finzel	PA SR 2010 near Finzel	A10003.41 !3.41	A10,005.49} !5.49
547.3 Maryland Route 547	MD 355 in North Bethesda	MD 185 in Kensington	A10001.8 !1.80	A10,002.90} !2.90
550.3 Maryland Route 550	MD 26 in Libertytown	Pen Mar	A10024.43 !24.43	A10,039.32} !39.32
552.3 Maryland Route 552	Dominion	US 50 / US 301 in Chester	A10002.2 !2.20	A10,003.54} !3.54
553.3 Maryland Route 553	Segments of old alignment of MD 2 in Edgewater		A10000.27 !0.27	A10,000.43} !0.43
560.3 Maryland Route 560	US 50 in Gorman	MD 135 in Mountain Lake Park	A10009.32 !9.32	A10,015.00} !15.00
561.3 Maryland Route 561	MD 213 near Chestertown	MD 298 in Lynch	A10002.48 !2.48	A10,003.99} !3.99
564.3 Maryland Route 564	MD 450 in Lanham	Bowie	A10006.73 !6.73	A10,010.83} !10.83
565.3 Maryland Route 565	Trappe	US 50 near Easton	A10005.77 !5.77	A10,009.29} !9.29
566.3 Maryland Route 566	MD 292 in Still Pond	MD 298 near Still Pond	A10001.19 !1.19	A10,001.92} !1.92
575.3 Maryland Route 575	US 113 near Berlin	MD 589 in Showell	A10002.7 !2.70	A10,004.35} !4.35
577.3 Maryland Route 577	MD 392 in Reliance	MD 298 near Federalsburg	A10003.7 !3.70	A10,005.95} !5.95
578.3 Maryland Route 578	MD 331 in Bethlehem	MD 16 in Harmony	A10004.24 !4.24	A10,006.82} !6.82
579.3 Maryland Route 579	Neavitt	MD 33 near Saint Michaels	A10007.84 !7.84	A10,012.62} !12.62
586.3 Maryland Route 586	MD 28 in Rockville	MD 97 in Wheaton	A10005.78 !5.78	A10,009.30} !9.30
587.3 Maryland Route 587	MD 150 in Middle River	Dogwood Drive in Wilson Point	A10001.14 !1.14	A10,001.83} !1.83
588.3 Maryland Route 588	MD 7 in Rosedale	Overlea	A10001.94 !1.94	A10,003.12} !3.12
589.3 Maryland Route 589	US 50 near Chestertown	US 113 near Briddletown	A10004.65 !4.65	A10,007.48} !7.48
591.3 Maryland Route 591	Segments of old alignment of US 1 near Conowingo		A10001.08 !1.08	A10,001.74} !1.74
598.3 Maryland Route 598	West Pocomoke	Princess Anne

See also [edit]