Milton is a town in Strafford County, New Hampshire, United States. The population was 4,598 at the 2010 census. A manufacturing, resort and residential town, Milton includes the village of Milton Mills. The primary village in town, where 575 people resided at the 2010 census, is defined as the Milton census-designated place (CDP), and is located along New Hampshire Route 125 and the Salmon Falls River, just north of Route 75.
Originally a part of Rochester variously called the "Northeast Parish", "Three Ponds" or "Milton Mills", the town was settled in 1760. It was set off and incorporated in 1802 as "Milton", the name either a contraction of "mill town", or else derived from a relative of the Wentworth colonial governors — William Fitzwilliam, Earl Fitzwilliam and Viscount Milton. The town of Fitzwilliam also bears his name.
The high concentration of water powered industries in Milton caused Ira W. Jones to found and operate an engineering firm from offices on Main Street in Milton. The company did business as I W Jones Engineers.
In 1893 Jonas Spaulding opened a leatherboard mill in Milton, organizing the business as J. Spaulding and Sons. His sons were Leon C., Huntley N. and Rolland H., of whom Huntley and Rolland would serve as governors of New Hampshire.