DIRECTORY of COUNTY AUDITORS        Mark R. Giesige Mercer County Auditor: Mark R. Giesige Population: 40,924 Parcel Count: 25,322 Office: 101 N. Main Street, #105 Celina, Ohio 45822 Office Hours: Monday, 8:30-5:00 Tuesday - Friday, 8:30-4:00 Telephone: 419-586-6402 Fax: 419-586-8089 E-mail: auditor@mercercountyohio.org Web Site: http://www.mercercountyohio.org