This graphic takes the top insurance providers in Bridgeport, CT and compares the average monthly cost of their respective premiums against the average cost of $473. 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 (12%), GEICO (-25%), Liberty Mutual (51%), Nationwide (-16%), Progressive (11%), State Farm (-32%), and USAA (-31%).