Ashburnham (/ˈæʃbɜːrnˌhæm/) is a town in Worcester County, Massachusetts, United States.

Ashburnham was originally made up of the lands granted to officers and soldiers of a 1690 expedition to Canada.

Ashburnham has two distinct topographical areas, hilly to the east and relatively flat high ground to the west.

To the east, Mount Watatic and Little Watatic Mountain rise in the northeastern part of town, with Jewell Hill to the southeast and Blood Hill rising just over the town line.

Several brooks also feed into these lakes and ponds, along with several others between the hills in the eastern part of town.

Ashburnham is bordered by Rindge, New Hampshire and New Ipswich, New Hampshire to the north, Ashby to the east, Westminster and a small portion of Fitchburg to the southeast, Gardner to the southwest, and Winchendon to the west.

There are several small villages within town, the most notable being North and South Ashburnham.

A line of the Montachusett Regional Transit Authority (MART) serves the town.

As of January 2020, the Board is served by Rosemarie Meissner (Chair), John Mulhall (member), Leo Janssens (member), and Mary Calandrella (Executive Assistant to Town Administrator).

[21] Ashburnham is part of the Ashburnham-Westminster Regional High School district, along with neighboring Westminster.