The county of Mercer is located in Ohio and was founded in January 2, 1824. There are 40,814 residents in Mercer who have access to courthouses in Celina, Coldwater. In general, each county has a full set of courts, from traffic court to superior and appellate court; supreme courts are usually located in the state capital. Ohio is part of the 6th federal circuit court as well.
There are 10,400 residents in Celina, which is 5.3 square miles and 876ft above sea level.