Insurance providers charge different rates based on the insured individual’s age. This graphic compares the average monthly premiums for Naperville, IL’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. These average monthly premiums are an average of the rates for both males and females. If you’re a 17-year old and are looking for the cheapest insurance provider in Naperville, Nationwide has the cheapest average cost at $582. Farmers, on the other hand, is the most expensive provider, with an average cost of $1,357. The best and worst providers for 25-year olds are: Allstate ($488) and State Farm ($217). For 35-year olds, USAA is the cheapest, and Allstate is the most expensive, at $177 and $395, respectively. And for those that are in the last age group, USAA is the cheapest insurance provider ($163), and Allstate is the least affordable provider for 60-year olds at $414 on average.