Home › Top 4 Insurance Company in Marion, Ohio Find best Insurance Company in Marion, Ohio, with all necessary contact information, including addresses, phone numbers, working hours, map locations, and website links. Shamrock Insurance Agency - Marion (OH 43302) US, Marion, OH 43302114 W Church St Nationwide Insurance: Douce Agency, LLC US, Marion, OH 433021685 Marion-Mt Gilead Rd DePolo & Associates, Inc: Allstate Insurance US, Marion, OH 433021107 Mt Vernon Ave Liberty Mutual Car Insurance - Marion (OH 43302) US, Marion, OH 433021116 Mt Vernon Ave