This depends on what you define "richest city" as.
Based on Adjusted Gross Income as reported to the IRS, zip code 57049, North Sioux City, South Dakota, is the richest city in South Dakota with an AGI of $331,454.
The Rothschilds
Nebraska, Kansas, and South Dakota.
Nebraska, Kansas and South Dakota
no
1. Rothchilds 2. Rockerfellas
South Dakota
No
The US state of South Dakota is south of the US state of North Dakota.
The US state of North Dakota is north of South Dakota.
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.
South Dakota did not have any 'colonial days' because South Dakota was not a colony. South Dakota was part of the Dakota Territory, so South Dakota had 'territorial days'.
North Dakota is up by the border of Canada, Wyoming is just next to South Dakota.