Hampden County is a county located in the U.S. state of Massachusetts. As of the most recent data available, the county has a population of approximately 456,228 people, with a population density of about 737.04 persons per square mile.
The county spans a total land area of 619.00 square miles (1,603.00 square kilometers). The administrative center and county seat is Springfield, which often serves as a hub for local governance and services. The largest city within the county by population is Springfield.
Geographically, Hampden County experiences varied elevations, with its highest point at Blandford 1,452 ft and its lowest point at West Springfield 65 ft. The region operates in the UTC-5.