Millers Mutual, based in Harrisburg, Pennsylvania, is a regional property and casualty insurer serving commercial policyholde ... rs in Pennsylvania, Delaware, Maryland, Ohio, Virginia and Washington, D.C., through a network of independent agents. Our mission is simple – we help businesses stay in business by protecting them from financial misfortune. And we do that by offering a full complement of commercial insurance products, including business owners and commercial package policies, inland marine, commercial auto, umbrella liability, workers compensation and employment practices liability. read more