This territory was separated from Marlborough in 1815, and combined with parts of Fitzwilliam, Swanzey, and Richmond to create a new town more central to those in outlying areas of those communities. A prominent citizen and friend of Governor John Taylor Gilman, Captain Benjamin Mann of Mason, suggested the name Troy. His daughter Betsy was married to Samuel Wilson, famous as Uncle Sam and at that time a resident of Troy, New York, which was incorporated the following year. At least seven members of the Wilson family were living in the town at the time, thus securing the name.
Population change for Troy totaled 622 over 56 years, from 1,445 in 1960 to 2,067 in 2016. The largest decennial percent change was an increase of 24 percent between 1970 and 1980; population declined over the next two decades. The 2016 Census estimate for Troy was 2,067 residents, which ranked 138th among New Hampshire's incorporated cities and towns. (info from NHES website)