Clay County is a county located in the U.S. state of Illinois. As of the most recent data available, the county has a population of approximately 14,560 people, with a population density of about 31.04 persons per square mile.
The county spans a total land area of 469.00 square miles (1,215.00 square kilometers). The administrative center and county seat is Louisville, which often serves as a hub for local governance and services. The largest city within the county by population is Flora.
Geographically, Clay County experiences varied elevations, with its highest point at Xenia 540 ft and its lowest point at Clay City 433 ft. The region operates in the UTC-6.