Mercer County is lying in the state of Ohio. With an area of 473 square miles, Mercer County is one of the larger counties in the state, while in population it is near the bottom with 4,092 inhabitants. Mercer County's population density of suburban makes it one of the least largely populated areas in the state. The county's largest city is Celina, with a population of 19,438.

Mercer County is one of the more wealthy regions in the state. The median income for Mercer County residents is $42,738, putting the area in in the top half of all counties in Ohio. As a reflection this, the average home price in Mercer County is $94,838, on par with the state average of $104,443.    Continued below...