St. Louis County Auditor's Office St. Louis County Auditor's Office Search | Advanced Search | New Members | Coupons and Discounts | All Categories Government & Education >> Government - County St. Louis County Auditor's Office 100 N 5th Ave W Room 214Duluth, MN 55802 | View on Google Maps Nancy Nilsen (218) 726-2380 | fax: (218) 726-5060 Visit Site If your business isn't here, contact us today to get listed!