Hampden County is a non-governmental county located in the Pioneer Valley of the U.S. state of Massachusetts, in the United States. As of the 2020 census, Hampden County's population was 465,825. Its traditional county seat is Springfield, the Connecticut River Valley's largest city, and economic and cultural capital; with an estimated population of 154,758, approximately one-third of Hampden County residents live in Springfield.
Hampden County is a non-governmental county located in the Pioneer Valley of the US state of Massachusetts in the United States As of the 2020 census Hampden County's population was 465825 Its traditional county seat is Springfield the Connecticut River Valley's largest city and economic and cultural capital; with an estimated population of 154758 approximately one-third of Hampden County residents live in Springfield