South Dakota Highway 314 (SD 314) is a 3.751-mile-long (6.037 km) state highway in southwestern Yankton County, South Dakota, United States, that runs from SD 50 to the western city limits of Yankton.

SD 314 had an average of 1325 vehicles.

From its western terminus SR 314 heads southeast through flat farmland to cross Deer Boulevard.

After continuing southeast for total of 3.751 miles (6.037 km) SD 314 reaches its eastern terminus at an intersection with West 11th Street at the western city limits of Yankton.

[2][3] The entire route is in Yankton County.