East Longmeadow is a town in Hampden County, Massachusetts, United States, situated in the Pioneer Valley region of Western Massachusetts. It had a population of 16,430 at the 2020 census. East Longmeadow is 5 mi (8.0 km) southeast of downtown Springfield, part of the Springfield Metropolitan Statistical Area. Additionally, the town is 25 mi (40 km) north of Hartford, 88 mi (142 km) southwest of Boston, and 142 mi (229 km) northeast of New York City.

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.