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List of highways numbered 121

Last updated December 23, 2025

Route 121 or Highway 121 can refer to multiple roads:

Argentina
Canada
Costa Rica
Japan
Nigeria
United Kingdom
United States

This list is incomplete; you can help by adding missing items. (August 2008)

Argentina

National Route 121

Canada

Costa Rica

National Route 121

Japan

Japan National Route 121

Nigeria

A121 highway (Nigeria)

United Kingdom

A121 road .
B121 road.

United States

Territories

Puerto Rico Highway 121

Preceded by 120	Lists of highways 121	Succeeded by 122

v t e List of highways numbered ...
0–9	0 1 1A 1B 1D 1X 2 2A 2N 3 3A 3B 3C 3E 3G 4 4A 5 5A 5B 6 6A 6N 7 7A 7B 7C 8 9 9A 9B 9E 9W
10–16	10 10A 10N 11 11A 11B 11C 12 12A 12B 12C 12D 12E 12F 13 13A 14 14A 15 15A 16 16A
17–22	17 17A 17B 17C 17E 17F 17J 18 18A 18B 18C 18D 18E 18F 19 19A 20 20A 20B 20C 20D 21 21A 22 22A
23–31	23 23A 24 24A 25 25A 25B 25C 26 26A 26B 27 27A 28 28A 28B 29 29A 30 30A 31 31A 31B 31C 31D 31E
32–44	32 32A 32B 33 33A 33B 34 34A 34B 35 35A 36 37 37A 38 38A 38B 39 40 40A 41 41A 42 43 44 44A
45–63	45 46 46A 47 48 48A 49 50 51 52 52A 53 54 54A 55 55A 56 56A 57 58 58A 59 59A 60 60A 61 62 62A 63 63A
64–85	64 65 66 67 68 69 69A 70 70A 71 72 72A 73 74 75 76 76C 77 77A 78 79 80 81 82 82A 83 84 85 85A
86–103	86 86A 86S 87 88 89 89A 90 91 92 93 94 95 96 97 98 99 99E 99W 100 100A 100B 100C 101 102 103
104–125	104 104A 104B 105 106 107 108 109 110 111 112 112S 113 114 115 116 117 118 119 120 121 122 123 124 125
126–149	126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 146A 147 148 149
150–174	150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174
175–199	175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
200–224	200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224
225–249	225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249
250–274	250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274
275–299	275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
300–324	300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
325–349	325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349
350–374	350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374
375–399	375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399
400–424	400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
425–449	425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449
450–474	450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474
475–499	475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499
500–524	500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524
525–549	525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549
550–574	550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574
575–599	575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599
600–624	600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624
625–649	625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
650–674	650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
675–699	675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699
700–724	700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724
725–749	725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749
750–774	750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774
775–799	775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799
800–824	800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824
825–849	825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
850–874	850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874
875–899	875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899
900–924	900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924
925–949	925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
950–974	950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974
975–999	975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999
1000+	1000–1499 1500–1999 2000

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