According to the
United States Census Bureau, the town has a total area of , of which is land and (0.86%) is water. Montgomery is bordered by
Southampton to the northeast,
Westfield to the southeast,
Russell to the southwest, and
Huntington to the northwest. Its border with the towns of Huntington and Southampton make up a portion of the Hampden-Hampshire county border. The center of Montgomery lies west-northwest of
Springfield and west of
Boston. Thus, like most of Western Massachusetts, it is closer to two other states' capitals—
Hartford and
Albany—than its own. The town of Montgomery lies atop a high plain, reaching into neighboring Huntington, framed by Lizzie Mountain to the northeast and Tekoa and Shatterack Mountains to the south and west, respectively. The latter two mountains rise from the banks of the
Westfield River, whose banks make up a portion of the town's border with Russell. Within the town, the Moose Meadow Brook runs from north to south, with the Westfield Reservoir atop the plain and the smaller Tekoa Reservoir near the bottom of the slope of its namesake mountain. Several other small brooks run through the town. Other than a short stretch, less than long, of
Interstate 90, located at the southern tip of town between Westfield and Russell, the town has no state or federal roads crossing through it. There are only nine roads which enter or exit the town's borders, four of which dead-end either just inside or outside of town. Along the banks of the Westfield River lie railroad tracks, which carry
CSX and
Amtrak trains between Springfield and Pittsfield, on their way westward. There is no other public transportation within town. The nearest general aviation airport is
Barnes Municipal Airport in Westfield, the nearest national service can be found at
Bradley International Airport in Connecticut, and the nearest full-service international airport is
Logan International Airport in Boston. ==Demographics==