Jasper 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 10,117 people, with a population density of about 20.48 persons per square mile.
The county spans a total land area of 494.00 square miles (1,279.00 square kilometers). The administrative center and county seat is Newton, which often serves as a hub for local governance and services. The largest city within the county by population is Newton.
Geographically, Jasper County experiences varied elevations, with its highest point at Newton 535 ft and its lowest point at Willow Hill 502 ft. The region operates in the UTC-6.