Iowa Heartland Credit Union Address: 1602 S Monroe Ave, Mason City, IA 50401 Phone: (641) 424-5391 Mortgages, Loans, Credit Unions Other Businesses: Advance America at 626 South Monroe, Mason City, IA 50401 Amber J Theobald-US Bank Mtg at 124 N Washington Ave, Mason City, IA 50401 Mister Money USA at 1417 4th St SW, Mason City, IA 50401