Farmington is a town located in Strafford County, New Hampshire, United States. The 2010 census reported that the town had a total population of 6,786. Farmington is home to Blue Job State Forest.The town center, where 3,885 people resided at the 2010 census, is defined by the U.S. Census Bureau as the Farmington census-designated place and is located at the junction of New Hampshire routes 75 and 153.