Merrimack is a town located in Hillsborough County, New Hampshire. As of the 2000 census, the town had a total population of 28,903 (including the East Merrimack Census District Place), making it the eighth largest municipality in New Hampshire.
There are four now anachronistic "villages" of Merrimack that make up the current town: Merrimack Village(formerly known as Souhegan Village), Thornton's Ferry, Reed's Ferry, and South Merrimack.
As of the census2 of 2000, there are 25,119 people, 8,832 households, and 6,986 families residing in the town. The population density is 297.5/km2 (770.6/mi2). There are 8,959 housing units at an average density of 106.1/km2 (274.8/mi2). The racial makeup of the town is 96.58% White, 0.73% African American, 0.19% Native American, 1.50% Asian, 0.04% Pacific Islander, 0.21% from other races, and 0.74% from two or more races. 1.08% of the population are Hispanic or Latino of any race.
There are 8,832 households out of which 41.9% have children under the age of 18 living with them, 68.1% are married couples living together, 7.8% have a female householder with no husband present, and 20.9% are non-families. 15.8% of all households are made up of individuals and 3.8% have someone living alone who is 65 years of age or older. The average household size is 2.84 and the average family size is 3.19.
In the town the population is spread out with 29.0% under the age of 18, 5.8% from 18 to 24, 34.2% from 25 to 44, 24.7% from 45 to 64, and 6.4% who are 65 years of age or older. The median age is 36 years. For every 100 females there are 99.3 males. For every 100 females age 18 and over, there are 96.7 males.
The median income for a household in the town is $68,817, and the median income for a family is $72,011. Males have a median income of $51,725 versus $31,528 for females. The per capita income for the town is $27,748. 1.9% of the population and 1.2% of families are below the poverty line. Out of the total population, 2.9% of those under the age of 18 and 3.1% of those 65 and older are living below the poverty line.
Humans began to settle the area currently known as Merrimack sometime after the recession of the glaciers that had spread over much of New England during the ice age. European Settlers first came to the area in the late 17th Century when the area was still in dispute between the Province of New Hampshire and Massachusetts Bay Colony.
Merrimack was officially incorporated in 1746, a year largely regarded as Merrimack's birthday, although only the southern portion (primarily what is known as Thornton's Ferry) of the current boundaries of town was included in the original town, with the northern portion of what is now Merrimack (primarily what is known as Reed's Ferry) being added a few years later.
The Boston and Maine Railroad laid tracks through the town in the 19th Century, with several stations operating until the mid 20th Century when the advent of the automobile transformed Merrimack from a largely agricultural community to a bedroom community of Boston and larger nearby cities in New Hampshire, becoming one of the northernmost points of the northeastern urban belt sometimes known as Megalopolis.