Car insurance companies number well over 100 in many states but who are the top 10 car insurance companies? Most drivers would not be surprised to see Allstate, State Farm or GEICO on the list of top 10 car insurance companies by market share but how about USAA, Farmers or Liberty Mutual? Below is an infographic detailing a list of the top 10 car insurance companies by market share for 2010, their associated revenues and more. Feel free to post this infographic on your website using the code below.