No, there are no countries that border South Dakota.
North Dakota and South Dakota border Minnesota to the east.
Only North Dakota shares a border with Canada.
The US state of Montana has an eastern border with North Dakota and South Dakota.
South Dakota extends farther North than Wyoming.South Dakota is more northerly than Wyoming. Wyoming's northern border is the the southern border of Montana while South Dakota hugs the eastern border of Montana about 100 miles up from its' southern border (MT).Wyoming is further west than South Dakota. South Dakota is bordered by Wyoming to the west.
Both North Dakota and South Dakota share a border with Minnesota. South Dakota also shares an eastern border with Iowa.
South Dakota is bordered by Nebraska to the south.
Yankton, South Dakota is on the border of South Dakota and Nebraska as are North Siuox City and Dakota Dunes, South Dakota. Big Stone City, South Dakota is on the border of South Dakota and Minnesota. Lemmon, South Dakota is located on the border of South Dakota and North Dakota.
Minnesota is the state which is east of both North Dakota and South Dakota. Minnesota shares its western border with North Dakota and South Dakota. Minnesota is bordered on the south by Iowa and on the east by Wisconsin and Michigan. Minnesota is bordered on the north by the Canadian provinces of Manitoba and Ontario.
North Dakota, South Dakota, Iowa, Wisconsin
North Dakota and South Dakota
Minnesota and Iowa. The straight part of South Dakota's eastern border and the part north of it is its border with Minnesota. Then the border goes east to the Big Sioux River and follows it until the Big Sioux River ends, and this is South Dakota's border with Iowa.