Lamar County is a county located in the U.S. state of Mississippi. As of the most recent data available, the county has a population of approximately 39,070 people, with a population density of about 78.61 persons per square mile.
The county spans a total land area of 497.00 square miles (1,287.00 square kilometers). The administrative center and county seat is Purvis, which often serves as a hub for local governance and services. The largest city within the county by population is West Hattiesburg.
Geographically, Lamar County experiences varied elevations, with its highest point at Purvis 381 ft and its lowest point at West Hattiesburg 0 ft. The region operates in the UTC-6.