Allen 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 108,473 people, with a population density of about 267.83 persons per square mile.
The county spans a total land area of 405.00 square miles (1,049.00 square kilometers). The administrative center and county seat is Lima, which often serves as a hub for local governance and services. The largest city within the county by population is Lima.
Geographically, Allen County experiences varied elevations, with its highest point at Harrod 991 ft and its lowest point at Lafayette 0 ft. The region operates in the UTC-5.