SD 11

Highway 11
Route of SD 11 (in red)
Route information
Defined by SDCL §31-4-131
Maintained by SDDOT
Length:	81.707 mi (131.495 km)
Existed:	1929 – present
Southern segment
Length:	5.046 mi (8.121 km)
South end:	I-29 Bus. in Elk Point
North end:	SD 50 near Richland
Northern segment
Length:	76.661 mi (123.374 km)
South end:	SD 48 in Union County
Major junctions:	US 18 near Canton I-90 in Brandon
North end:	MN 269 near Sherman
Location
Counties:	Union, Lincoln, Minnehaha, Moody
Highway system
South Dakota Highways Interstate U.S. State ← SD 10 SD 12 →

South Dakota Highway 11 (SD 11) is a state route in southeast South Dakota. It is split into two segments. The shorter of these segments begins at I-29 Bus. in Elk Point and runs north to an intersection with SD 50, and is approximately five miles (8.0 km) long. The longer segment begins at an intersection with SD 48 and runs northerly through Sioux Falls to the Minnesota state line north of Sherman where it continues east as Minnesota State Highway 269. This segment is about 77 miles (124 km) in length.

In total, the SD 11 designation spans just under 82 miles (132 km).

SD 11 is defined by South Dakota Codified Law §31-4-131. According to this statute, the segment of the road between SD 48 and SD 50 is currently not a portion of the highway. The segment of the highway in Sioux Falls from 85th Street through the concurrency with SD 42, as well as the segment from the Madison Street intersection to the interchange with I-90, are included in the National Highway System, a system of highways important to the nation's defense, economy, and mobility.

The southern segment of SD 11 begins at the corner of I-29 Bus. and Franklin Street in Elk Point. The route turns west onto Rose Street. The highway then curves to the north, leaving the city of Elk Point and ending at an intersection with SD 50.