Grinnell auto insurance is offered by Grinnell Mutual Reinsurance Company in 12 states. Grinnell Mutual Reinsurance Company is a financially stable reinsurance company that does not sell auto insurance as its main product, but offers coverage for autos and sport vehicles as well as umbrella and home insurance. Quotes cannot be obtained from the company website and there is not much information about the company’s quality of auto insurance customer support. However, it is a financially secure company with a long established history in selling reinsurance in the Midwest, and its auto insurance may be good choice for customers of its other products.