Middleton is a town in Strafford County, New Hampshire, United States. The population was 1,823 at the 2020 census. Granted by the Masonian Proprietors in 1749, the town was named after Sir Charles Middleton, 1st Baron Barham, who was in charge of convoy service between Barbados and the colonies. The land was first settled shortly before the Revolut…Middleton is a town in Strafford County, New Hampshire, United States. The population was 1,823 at the 2020 census. Granted by the Masonian Proprietors in 1749, the town was named after Sir Charles Middleton, 1st Baron Barham, who was in charge of convoy service between Barbados and the colonies. The land was first settled shortly before the Revolutionary War by settlers from Lee and Rochester. Soon after the war, its population was challenged when a number of Quaker families led by the town auditor, Nicholas Austin, left for the more peaceful setting of Austin, Quebec. Although the soil is rocky and unsuited for cultivation, cider was made in considerable quantities, and maple syrup to some extent.