Longmeadow is a town in Hampden County, Massachusetts, in the United States. The population was 15,853 at the 2020 census.

Longmeadow was first settled in 1644, and officially incorporated October 17, 1783. The town was originally farmland within the limits of Springfield. It remained relatively pastoral until the street railway was built c. 1910, when the population tripled over a fifteen-year period. After Interstate 91 was built in the wetlands on the west side of town, population tripled again between 1960 and 1975.

During the 19th and early 20th centuries, Longmeadow was best known as the site from which Longmeadow brownstone was mined. Several famous American buildings, including Princeton University’s Neo-Gothic library, are made of Longmeadow brownstone. In 1894, the more populous and industrialized “East Village” portion of the town containing the brownstone quarries split off to become East Longmeadow.

Designed by famed golf course architect Donald Ross in 1922, the Longmeadow Country Club was the proving ground for golf equipment designed and manufactured by the Spalding Co. of Chicopee. Bobby Jones, a consultant for Spalding, was a member in standing at LCC and made a number of his instructional films at LCC in the 1930s.

Longmeadow is located in the western part of the state, just south of the city of Springfield, and is bordered on the west by the Connecticut River and Agawam, to the east by East Longmeadow, and to the south by Enfield, Connecticut. It extends approximately 3 miles (5 km) north to south and 4 miles (6.4 km) east to west. It is approximately 20 miles (32 km) north of Hartford.

More than 30% of the town is permanent open space. Conservation areas on the west side of town include more than 750 acres (3.0 km) bordering the Connecticut River. The area supports a wide range of wildlife including deer, beaver, wild turkeys, foxes, and eagles. Springfield’s Forest Park, which at 735 acres (2.97 km²) is the largest city park in New England, forms the northern border of the town. The private Twin Hills and public Franconia golf courses, plus town athletic fields and conservation land, cover nearly 2/3 of the eastern border of the town. Two large public parks, the Longmeadow Country Club, and three conservation areas account for the bulk of the remaining formal open space. Almost 20% of the houses in town are in proximity to a “dingle”, a tree-lined steep-sided sandy ravine with a wetland at the bottom that provides a privacy barrier between yards^{[citation needed]}.