What Is The Biggest Car Insurance Company In Us? 
The biggest car insurance company in the US is State Farm , followed by Allstate and Berkshire Hathaway Insurance Group . Progressive , Farmers and USAA are also very large companies . In your particular state , you may find other insurers to be more popular ; such as Erie , Travelers or Geico . As experienced brokers , our job is to compare and find the lowest rates available in your area and present you with the best options for your specific vehicles . 