South Dakota Highway 45

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Highway 45
Route of SD 45 (in red)
Route information
Maintained by SDDOT
Length	198 mi (319 km)
Existed	1927–present
Major junctions
South end	SD 44 / SD 50 in Platte
Major intersections	I-90 in Kimball US 14 in Miller US 212 near Faulkton US 12 in Ipswich
North end	ND 3 near Ashley
Location
Country	United States
State	South Dakota
Counties	Charles Mix Brule Buffalo Hand Faulk Edmunds McPherson
Highway system
South Dakota State Trunk Highway System Interstate US State
← SD 44 → SD 46

South Dakota Highway 45 is a state highway that runs north to south across much of central South Dakota, United States. The northern terminus is at the North Dakota border as a continuation of North Dakota Highway 3, and runs south to South Dakota Highway 44 at Platte. It is 198 miles (319 km) in length.