Merrimack County, NH Population

Overview

152,983

Total Population

43.0

Median age

50.39%

Female population %

98.4:100

Gender ratio (M:F)

55-59 years

Largest age group

51.0

Total dependency ratio

White

Largest racial group

3,624

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Merrimack County's population is old compared to the rest of the country:

The median age in Merrimack County is 43.0, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Merrimack County's population under 18 was 19.10%, compared to the 22.51% nationwide.
Merrimack County's elderly or the senior population (over 65 age) was 18.36% as compared to 16.04% nationwide.
Of the total population in Merrimack County, 15.44% were under the age of 15, 18.84% aged 15 to 29, 47.37% aged 30 to 64, 16.26% aged 65 to 84, and 2.10% were 85 years of age and older.

There are 1,207 more females than males in Merrimack County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.39% females and 49.61% males in Merrimack County, NH.
The Merrimack County, NH gender ratio is 98.4:100 i.e. 98.4 men to 100 women (0.984).
For male population, the largest age group is 55-59 years with a population of 5,894.
For the female population, the largest age group is 55-59 years with a population of 6,200.

Merrimack County's population has become increasingly diverse:

Racial distribution of Merrimack County population: 92.74% are White, 1.60% are Black or African American, 0.32% are American Indian and Alaska Native, 1.94% are Asian, 0.01% are Native Hawaiian and other Pacific Islander, 0.39% are some other race and 3% are multiracial.
Merrimack County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 3,624 is Hispanic or Latino (of any race), and 149,359 (97.63% of the total population) is Non-Hispanic.
The largest racial group in Merrimack County is White with a population of 141,87 (92.74% of the total population).

Merrimack County's population has not reached its peak yet and is showing a trend of further growth:

The peak population was 156,020 in the year 2022
From 2000 to 2010, Merrimack County's population increased by 9,699 (7.10%), as compared to the national growth of 9.63%.
From 2010 to 2020, Merrimack County's population increased by 7,627 (5.21%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Merrimack County's population was lowest in year 2000 at 136,696.