Marion County is a county located in the U.S. state of Kentucky. As of the most recent data available, the county has a population of approximately 18,212 people, with a population density of about 52.48 persons per square mile.
The county spans a total land area of 347.00 square miles (899.00 square kilometers). The administrative center and county seat is Lebanon, which often serves as a hub for local governance and services. The largest city within the county by population is Lebanon.
Geographically, Marion County experiences varied elevations, with its highest point at Gravel Switch 910 ft and its lowest point at New Market 0 ft. The region operates in the UTC-5.