Defiance County is a county located in the U.S. state of Ohio. As of the most recent data available, the county has a population of approximately 39,500 people, with a population density of about 96.11 persons per square mile.
The county spans a total land area of 411.00 square miles (1,064.00 square kilometers). The administrative center and county seat is Defiance, which often serves as a hub for local governance and services. The largest city within the county by population is Defiance.
Geographically, Defiance County experiences varied elevations, with its highest point at Hicksville 766 ft and its lowest point at Defiance 685 ft. The region operates in the UTC-5.