Middlefield Banking Company Middlefield Banking Company Search | Advanced Search | New Members | Coupons and Discounts | All Categories   Finance & Insurance >> Mortgage, Lending, & Nondepository Credit Intermediation Middlefield Banking Company 33 South Cleveland AvenueWesterville, OH 43081 | map | directions (614) 948-7102 Visit Site Need to update your categories or expand your listing? Or want to learn how your business can become a part of the Chamber? Contact us at membership@columbus.org for assistance.