About Celina, OH       Community Development Education Grand Lake Mariners Health Care Facilities History of Celina Local Restaurants Lodging Mercer County Courthouse New Resident/Vistor Info Points of Interest Parks & Recreation  Celina is at the "heart" of Mercer County. To the left you will find links to information about Celina you may find helpful. Below is a link to economic statistics for the Celina and Mercer County area. If you have any questions in regards to Community Development in Celina please call 419-586-6464. Mercer County Profile per Ohio Dept. of Development Member of Ohio Municipal League