What Are The Top Five Auto Insurance Companies? 
The largest insurers of private passenger vehicles in the USA , in order by US market share , are State Farm , GEICO , Allstate , Progressive , and Farmers Insurance Group . However , the top five companies will vary by state . For example , American Family Insurance is the company with the largest auto insurance market share in Wisconsin . Each state 's auto insurance market is unique . The top five companies in terms of US auto insurance market share are large national companies available in most US states . However , regional insurance companies often have large market share in certain states , like Commerce Insurance in Massachusetts . So , the important auto insurance companies will depend on where you live . The companies with the largest market shares do not necessarily make them the best companies for you . Progressive & GEICO continue to have large gains in market share over recent years , which may be a sign they have lower rates than competitors . Some of the best companies can be smaller regional companies . For example , companies like Erie & Auto-owners usually score higher than many other companies in annual JD Power auto customer satisfaction & auto claims satisfaction studies . The best thing you can do is read reviews & check the ratings of all the major auto insurance companies in your state , and compare their coverage , service , and rates . People really can find a better auto insurance company with much lower rates , if they shop with enough companies . 