South Dakota Highway 73

South Dakota Highway 73 (SD 73) is a state route that runs across western South Dakota. It begins at the Nebraska border north of Merriman, Nebraska, as a continuation of Nebraska Highway 61. It runs to the North Dakota border, where it continues as North Dakota Highway 49. It is just more than 255 miles (410 km) in length.

Highway 73 marker

Highway 73
Route of SD 73 (in red)
Route information
Defined by SDCL §31-4-176
Maintained by SDDOT
Length255.291 mi[1][2] (410.851 km)
Major junctions
South end N-61 at the Nebraska border
North end ND 49 at Thunder Hawk
CountiesBennett, Jackson, Haakon, Ziebach, Meade, Perkins, Corson
Highway system
  • South Dakota Highways
SD 71SD 75


When designated in the 1920s, South Dakota 73 only consisted of the segment from Faith (U.S. Route 212) to Lemmon (U.S. Route 12). The remainder of the route was unnumbered.

Around 1935, SD 73 was extended south from Faith, absorbing what had been a portion of South Dakota Highway 24 to near Plainview, then southeast via a new route to Philip. From there, it was concurrent with U.S. Highway 16 to Kadoka then southward along what had been South Dakota Highway 63. It continued south to the Nebraska border south of Martin, after sharing an alignment with U.S. Highway 18. Except for minor route straightening and a new concurrency with Interstate 90, this route has not changed since.

Around 1979, the northern terminus was extended east along U.S. 12 to Thunder Hawk, where it met up with a new road to link with ND 49.

Major intersectionsEdit

Cherry0.0000.000  N-61 southContinuation into Nebraska
BennettMartin12.58020.246  US 18 westWestern end of US 18 concurrency
24.64639.664  US 18 eastEastern end of US 18 concurrency
Jackson50.33981.013  SD 44
Kadoka69.951112.575  SD 248
  I-90 eastEastern end of I-90 concurrency
  I-90 westWestern end of I-90 concurrency
HaakonPhilip92.047148.135  US 14
116.740187.875  SD 34 eastEastern end of SD 34 concurrency
No major junctions
Meade145.523234.197  SD 34 westWestern end of SD 34 concurrency
Faith173.638279.443  US 212 eastEastern end of US 212 concurrency
176.801284.534  US 212 westWestern end of US 212 concurrency
Perkins206.704332.658  SD 20 eastSouthern end of SD 20 concurrency
212.698342.304  SD 20 westNorthern end of SD 20 concurrency
240.858387.623  US 12 westWestern end of US 12 concurrency
Corson254.618409.768  US 12 eastEastern end of US 12 concurrency
Sioux255.291410.851  ND 49 northContinuation into North Dakota
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b "State Highway Log: Pierre Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 22, 2013.
  2. ^ a b "State Highway Log: Rapid City Region" (PDF). South Dakota Department of Transportation. January 2012. Retrieved December 22, 2013.

External linksEdit

Route map:

KML is from Wikidata