This graphic takes the top insurance providers in Sioux Falls, SD and compares the average monthly cost of their respective premiums against the average cost of $308. The state’s top providers, and the percent difference that is between their average monthly cost and the average cost in the city as a whole are: Allstate (22%), Farmers (-1%), GEICO (-42%), Liberty Mutual (58%), Nationwide (-34%), Progressive (-6%), and State Farm (-44%).