Newfields is a town in Rockingham County, New Hampshire, United States. The population was 1,769 at the 2020 census. The primary village in town, where 378 people resided at the 2020 census, is defined as the Newfields census-designated place (CDP) and is located along New Hampshire Route 85 and the Squamscott River. It is a quaint village of handsome old houses.

Rockingham County is a county in the U.S. state of New Hampshire. As of the 2020 census, the population was 314,176, making it New Hampshire's second-most populous county. The county seat is Brentwood. Rockingham County is part of the Boston-Cambridge-Newton, MA-NH Metropolitan Statistical Area and the greater Boston-Worcester-Providence, MA-RI-NH-CT Combined Statistical Area. Per the 2020 census, it was New Hampshire's fastest growing county from 2010 to 2020.