US 421 highlighted in red | ||||
| Route information | ||||
| Maintained byKYTC | ||||
| Length | 250.536 mi[1] (403.199 km) | |||
| Major junctions | ||||
| South end | ||||
| Major intersections | ||||
| North end | ||||
| Location | ||||
| Country | United States | |||
| State | Kentucky | |||
| Counties | Harlan,Leslie,Clay,Jackson,Rockcastle,Madison,Fayette,Scott,Woodford,Franklin,Shelby,Henry,Trimble | |||
| Highway system | ||||
| ||||
| ||||
U.S. Route 421 (US 421) in the U.S. state ofKentucky is a 250.536-mile-long (403.199 km) north–southUnited States highway that traverses twelve counties in the central andeastern parts of the state. It travels in a southeast-to-northwest path from theVirginia state line nearPennington Gap to theIndiana state line, on theOhio River atMilton, Kentucky andMadison, Indiana.[2]
US 421 entersHarlan County fromLee County, Virginia, and meetsUS 119 nearHarlan. AtHyden, US 421 turns westward towardsClay County, and crosses theHal Rogers Parkway via an overpass without access nearManchester.[3]
At Manchester, US 421 turns northwestward towardsJackson County, throughMcKee. It traverses the far northeastern corner ofRockcastle County before enteringMadison County where it joinsU.S. 25 south ofRichmond near theBlue Grass Army Depot. US 25 and US 421runs concurrently through Richmond, and all the way to theI-75 junction.[4]
US 25/421 also runs concurrently with I-75 between Exits 97 and 99. After Exit 99, the two U.S. routes continue to run concurrently until downtownLexington just after crossingUS 27/60/68. While US 25 makes a right turn onto Georgetown Road, US 421 continues straight northwestward, as Leestown Pike, towardsMidway andFrankfort.[5]
In Frankfort, US 421 has concurrencies with US 60 on the east side of town, and US 127 on the north side. US 421 continues northwestward intoHenry and far northernShelby counties before crossing the Exit 34 exit ofI-71.US 42 inBedford is the last major intersection in Kentucky before US 421 crosses the Ohio River fromTrimble County intoJefferson County, Indiana.[6]
| Location | Frankfort-Lexington, Kentucky |
|---|---|
| Length | 20.5 mi (33.0 km) |
| Existed | 1929–1952? |
US 421 did not have any presence in Kentucky until it was extended into Kentucky and Indiana at one point between 1939 and 1957, probably in the late 1940s or early 1950s.[7] When US 421 was designated into Kentucky, it was routed onto the following existing routes:
| County | Location | mi[1] | km | Destinations | Notes | |||
|---|---|---|---|---|---|---|---|---|
| Harlan | | 0.000 | 0.000 | Continuation intoVirginia | ||||
| | 1.351 | 2.174 | Southern terminus of KY 3462 | |||||
| Cranks | 2.783 | 4.479 | Southern terminus of KY 568 | |||||
| | 3.795 | 6.107 | Southern terminus of KY 3001 | |||||
| | 4.034 | 6.492 | Eastern terminus of KY 1138 | |||||
| | 6.410 | 10.316 | Eastern terminus of KY 987 | |||||
| | 8.008 | 12.888 | Connector road | |||||
| | 10.784 | 17.355 | Northern terminus of KY 3001 | |||||
| | 10.974 | 17.661 | Southern terminus of KY 2074 | |||||
| | 12.901 | 20.762 | Northern terminus of KY 2428 | |||||
| Harlan | 14.966 | 24.085 | Southern end of KY 72 concurrency | |||||
| 15.127 | 24.345 | Northern end of KY 72 concurrency; southern terminus of KY 3459 | ||||||
| 15.704 | 25.273 | Northern terminus of KY 3459 | ||||||
| 15.967 | 25.696 | Western terminus of KY 38 | ||||||
| | 16.761 | 26.974 | Eastern terminus of KY 840 | |||||
| | 17.003 | 27.364 | ||||||
| | 17.107 | 27.531 | Southern end of US 119 concurrency | |||||
| | 17.846 | 28.720 | Northern end of US 119 concurrency | |||||
| | 17.936 | 28.865 | ||||||
| | 21.800 | 35.084 | Western terminus of KY 1679 | |||||
| Bledsoe | 23.893 | 38.452 | Southern end of KY 221 concurrency | |||||
| | 24.942 | 40.140 | Northern end of KY 221 concurrency | |||||
| Leslie | | 30.543 | 49.154 | Eastern terminus of KY 2058 | ||||
| Asher | 38.352 | 61.722 | Northern terminus of KY 1780 | |||||
| Hoskinston | 41.848 | 67.348 | Northern terminus of KY 2009 | |||||
| Stinnett | 42.827 | 68.923 | Northern terminus of KY 406 | |||||
| Hyden | 49.113 | 79.040 | Southern end of KY 80 concurrency | |||||
| 49.619 | 79.854 | Southern terminus of KY 257 | ||||||
| 50.140 | 80.693 | Eastern terminus of KY 118 | ||||||
| Bobs Fork | 60.747 | 97.763 | Southern terminus of KY 1482 | |||||
| | 62.375 | 100.383 | Southern terminus of KY 3428 | |||||
| Clay | | 64.752 | 104.208 | Southern end of KY 66 concurrency | ||||
| | 65.527 | 105.455 | Northern end of KY 66 concurrency | |||||
| | 73.337 | 118.024 | Eastern terminus of KY 2443 | |||||
| | 73.525 | 118.327 | Western terminus of KY 1524 | |||||
| | 76.619 | 123.306 | Western terminus of KY 149 | |||||
| Garrard | 78.234 | 125.905 | Western terminus of KY 1999 | |||||
| | 78.654 | 126.581 | Southern end of KY 11 concurrency | |||||
| Manchester | 79.842 | 128.493 | Southern end of KY 80 concurrency; southern terminus of KY 2076; 80 and the parkway to the south, 2076 to the west | |||||
| 80.896 | 130.189 | Western terminus of KY 2438 | ||||||
| 80.947 | 130.272 | Southern terminus of KY 2440 | ||||||
| 81.043 | 130.426 | Eastern terminus of KY 687 | ||||||
| 81.380 | 130.968 | Eastern terminus of KY 2442 | ||||||
| 81.453 | 131.086 | Northern terminus of KY 2440 | ||||||
| 81.507 | 131.173 | Western terminus of KY 3472 | ||||||
| 81.774 | 131.602 | Eastern terminus of KY 638 | ||||||
| | 83.140 | 133.801 | Eastern terminus of KY 3560 | |||||
| | 83.741 | 134.768 | Eastern terminus of KY 3473 | |||||
| | 85.779 | 138.048 | Western terminus of KY 3477 | |||||
| | 86.943 | 139.921 | Northern end of KY 11 concurrency | |||||
| | 87.333 | 140.549 | Eastern terminus of KY 472 | |||||
| | 91.420 | 147.126 | Southern terminus of KY 1350 | |||||
| | 92.703 | 149.191 | Eastern terminus of KY 3478 | |||||
| | 94.359 | 151.856 | Southern end of KY 577 concurrency | |||||
| | 95.134 | 153.103 | Northern end of KY 577 concurrency | |||||
| Jackson | | 97.305 | 156.597 | Eastern terminus of KY 3443 | ||||
| | 99.265 | 159.752 | Southern end of KY 30 concurrency | |||||
| | 99.417 | 159.996 | Western terminus of KY 1431 | |||||
| Tyner | 99.550 | 160.210 | Eastern terminus of KY 3630 | |||||
| | 100.364 | 161.520 | Northern end of KY 30 concurrency | |||||
| | 103.251 | 166.166 | Western terminus of KY 1071 | |||||
| | 105.717 | 170.135 | Western terminus of KY 3445 | |||||
| Deer View | 106.542 | 171.463 | Southern terminus of KY 587 | |||||
| McKee | 109.951 | 176.949 | Southern terminus of KY 290 | |||||
| 110.001 | 177.029 | Southern end of KY 89 concurrency | ||||||
| 110.548 | 177.910 | Northern end of KY 89 concurrency | ||||||
| | 117.303 | 188.781 | Western terminus of KY 3446 | |||||
| | 117.878 | 189.706 | Southern terminus of KY 2004 | |||||
| | 121.950 | 196.260 | Northern terminus of KY 1955 | |||||
| | 124.669 | 200.635 | Western terminus of KY 3447 | |||||
| Morrill | 125.260 | 201.586 | Northern terminus of KY 1912 | |||||
| Rockcastle | No major junctions | |||||||
| Madison | | 128.085 | 206.133 | Southern end of KY 21 concurrency | ||||
| Big Hill | 128.250 | 206.398 | Northern end of KY 21 concurrency | |||||
| | 129.480 | 208.378 | Western terminus of KY 594 | |||||
| Bobtown | 133.205 | 214.373 | Northern terminus of KY 1016 | |||||
| | 135.058 | 217.355 | Southern end of KY 3376 concurrency | |||||
| | 135.549 | 218.145 | Northern end of KY 3376 concurrency | |||||
| | 136.162 | 219.131 | Southern end of KY 499 concurrency | |||||
| | 136.196 | 219.186 | Northern end of KY 499 concurrency | |||||
| | 138.579 | 223.021 | Southern end of US 25 concurrency | |||||
| | 139.580 | 224.632 | Eastern terminus of KY 2872 | |||||
| Richmond | 141.994 | 228.517 | Eastern terminus of KY 876; southern terminus of US 25 Bus. and US 421 Bus.; EKU to the west via KY 876 | |||||
| 142.751 | 229.735 | |||||||
| 145.250 | 233.757 | Southern terminus of KY 1986 | ||||||
| | 146.426 | 235.650 | Northern terminus of US 25 business route; unsigned KY 2876 to the north | |||||
| Richmond | 146.730– 146.939 | 236.139– 236.475 | I-75 exit 90 | |||||
| 147.516 | 237.404 | Southern terminus of KY 1156 | ||||||
| | 149.009 | 239.807 | Southern terminus of KY 2878 | |||||
| | 151.925 | 244.500 | Western terminus of KY 627; northern terminus of KY 3005 | |||||
| | 154.348 | 248.399 | Southern terminus of KY 2328 | |||||
| | 154.547 | 248.719 | I-75 Exit 97 | |||||
| | 154.691– 154.713 | 248.951– 248.986 | Southern end of I 75 concurrency; KY 2884 straight ahead | |||||
| Fayette | Lexington | 155.828 | 250.781 | Exit from I-75 south; northern terminus of KY 2328 | ||||
| 155.028 | 249.493 | Northern end of I-75 concurrency; I-75 exit 99 | ||||||
| 158.573 | 255.199 | Southern terminus of KY 1973 | ||||||
| 158.820 | 255.596 | Southern terminus of KY 1975 | ||||||
| 159.336 | 256.426 | Western terminus of KY 418 | ||||||
| 165.762 | 266.768 | Man o' War Boulevard | ||||||
| 166.763– 166.864 | 268.379– 268.542 | Interchange. KY 4 exit 15 | ||||||
| 169.461 | 272.721 | Southern end of US 60 concurrency; begin one-way split of east/west lanes | ||||||
| 170.197 | 273.906 | North end of US 60 concurrency; 27 and 68 both ways, 60 continues to the south | ||||||
| 170.226 | 273.952 | North end of one-way split | ||||||
| 170.660 | 274.651 | North end of US 25 concurrency; 25 continues to the north, 922 both ways | ||||||
| 172.380– 172.524 | 277.419– 277.650 | Interchange; KY 4 exit 7 | ||||||
| 172.956 | 278.346 | Southern terminus of KY 1978 | ||||||
| 173.541 | 279.287 | Eastern terminus of KY 1878 | ||||||
| 176.371 | 283.842 | Western terminus of KY 1977 | ||||||
| Scott | | 179.580 | 289.006 | Southern end of US 62 concurrency | ||||
| Woodford | Midway | 180.512 | 290.506 | Southern terminus of KY 341 | ||||
| 182.747 | 294.103 | Northern end of US 62 concurrency | ||||||
| | 186.122 | 299.534 | ||||||
| Franklin | Frankfort | 190.750 | 306.982 | Interchange; KY 676 straight ahead, ramp to US 60; eastern terminus of KY 676; southern end of US 60 concurrency | ||||
| 192.202 | 309.319 | Northern end of US 60 concurrency; western terminus of US 460 | ||||||
| 193.653 | 311.654 | Southern end of US 127 concurrency; interchange | ||||||
| 195.448 | 314.543 | Northern terminus of KY 420 | ||||||
| 195.592– 195.736 | 314.775– 315.007 | Robert C. Yount Memorial Bridges over theKentucky River (one bridge for each direction of travel) | ||||||
| 195.856 | 315.200 | Northern end of US 127 concurrency; northern terminus of KY 1211 | ||||||
| | 198.083 | 318.784 | Southern terminus of KY 1570 | |||||
| | 200.290 | 322.336 | Northern terminus of KY 1665 | |||||
| | 202.465 | 325.836 | ||||||
| | 208.280 | 335.194 | Southern terminus of KY 561 | |||||
| Henry | | 213.652 | 343.840 | Northern terminus of KY 1922 | ||||
| Shelby | | 215.900 | 347.457 | Northern terminus of KY 43 | ||||
| Henry | Pleasureville | 217.863 | 350.617 | Southern end of KY 22 concurrency | ||||
| 217.878 | 350.641 | Northern terminus of KY 241 | ||||||
| | 220.435 | 354.756 | Northern end of KY 22 concurrency; southern terminus of KY 3222 | |||||
| | 223.267 | 359.313 | Southern end of KY 55 concurrency | |||||
| New Castle | 224.611 | 361.476 | Eastern terminus of KY 573; western terminus of KY 146 | |||||
| | 225.110 | 362.279 | Southern terminus of KY 202 | |||||
| | 226.871 | 365.113 | Southern terminus of KY 193 | |||||
| | 231.478 | 372.528 | Western terminus of KY 574 | |||||
| Campbellsburg | 231.551 | 372.645 | Northern end of KY 55 concurrency | |||||
| 232.538 | 374.234 | Northern terminus of KY 997 | ||||||
| | 234.046– 234.195 | 376.661– 376.900 | I-71 exit 34 | |||||
| | 234.719 | 377.744 | Northern terminus of KY 1606 | |||||
| Trimble | | 238.188 | 383.326 | Western terminus of KY 316 | ||||
| Bedford | 241.686 | 388.956 | Southern end of US 42 concurrency | |||||
| 241.857 | 389.231 | Northern end of US 42 concurrency | ||||||
| 242.933 | 390.963 | Southern terminus of KY 625 | ||||||
| | 245.425 | 394.973 | Eastern terminus of KY 2870 | |||||
| | 246.031 | 395.949 | Western terminus of KY 1226 | |||||
| | 247.820 | 398.828 | Western terminus of KY 1492 | |||||
| Milton | 251.507 | 404.761 | Northern terminus of KY 625 | |||||
| 253.228 | 407.531 | Western terminus of KY 36 | ||||||
| Ohio River | 253.933– 254.351 | 408.666– 409.338 | Milton–Madison Bridge | |||||
| Jefferson | Madison | 0.000 | 0.000 | Continuation intoIndiana | ||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
| ||||||||
| Previous state: Virginia | Kentucky | Next state: Indiana |