This graphic compares the average monthly premiums for Sioux Falls, SD’s top insurers for four different age groups. These age groups are 17-year olds, 25-year olds, 35-year olds, and 65-year olds. This is important to take into consideration because insurance providers charge different rates based on the policy holder’s age. If you’re a 17-year old and are looking for the cheapest insurance provider in Sioux Falls, GEICO has the cheapest average cost at $548. Liberty Mutual, on the other hand, is the most expensive provider, with an average cost of $1,981. The best and worst providers for 25-year olds are: Liberty Mutual ($476) and GEICO ($204). For 35-year olds, State Farm is the cheapest, and Liberty Mutual is the most expensive, at $184 and $456, respectively. And for those that are in the last age group, State Farm is the cheapest insurance provider ($165), and Liberty Mutual is the least affordable provider for 60-year olds at $376 on average.