Suffield is a town in Hartford County, Connecticut, United States. It was once within the boundaries of Massachusetts. The town is located in the Connecticut River Valley with the town of Enfield neighboring to the east. In 1900, 3,521 people lived in Suffield; as of the 2010 census, the population was 15,735. The town center is a census-designated place listed as Suffield Depot in U.S. Census records.
Bordering Massachusetts, Suffield is part of the Springfield, Massachusetts NECTA. Suffield is only 8 miles (13 km) from Springfield, and is more oriented toward it than toward Connecticut's capital of Hartford, which lies 16 miles (26 km) to the south.
Originally known as Southfield—pronounced "Suffield," on May 20, 1674, the committee for the settling of the town petitioned:
...that the name of the place may be Suffield, it being the southernmost town that either at present is, or like to be in that Countrey, and neere adjoining to the south border of our Patent in those parts. [sic]
The petition was granted by the Massachusetts Bay court on June 8, 1674. Suffield was incorporated as a town in March 1682.
Also, on early 17th and 18th century maps, Suffield was alternatively spelled as Suthfield.
Suffield and the surrounding area were part of the Equivalent Lands compromise with Massachusetts in 1715–16.
Suffield's native and adopted sons include The Rev.