Merrimack County, New Hampshire Demographics 2026

Name: Merrimack County, New Hampshire Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Merrimack County, New Hampshire has a population of 155,967, the 3rd most populous county in New Hampshire. The median household income is $97,004 and the median home value is $367,600. The poverty rate is 7.6%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Merrimack County Quick Facts

Population 155,967

Median Household Income $97,004

Median Home Value $367,600

Poverty Rate 7.6%

Unemployment Rate 3.1%

Median Age 42.9 years

Homeownership Rate 73.5%

Affordability Ratio 3.8x

Bachelor's Degree+ 38.9%

High School Graduation 94.5%

Cities/Places 14

Population 155,967 3rd of 10

Median Income $97,004 2% lower than state

Poverty Rate 7.6%

Unemployment 3.1%

How Merrimack County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	155,018	155,967	+0.6%
Median household income	$93,944	$97,004	+3.3%
Median home value	$330,600	$367,600	+11.2%

Median Household Income

Merrimack

$97,004

$99,031

National

$80,734

Median Home Value

Merrimack

$367,600

$402,500

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 10.2%

$25K-$50K 14.4%

$50K-$100K 26.9%

$100K+ 48.5%

Detailed income brackets

Under $10K

3.0%

$10K-$15K

1.9%

$15K-$20K

2.9%

$20K-$25K

2.3%

$25K-$30K

3.2%

$30K-$35K

2.8%

$35K-$40K

2.9%

$40K-$45K

2.7%

$45K-$50K

2.7%

$50K-$60K

5.1%

$60K-$75K

9.2%

$75K-$100K

12.6%

$100K-$125K

12.1%

$125K-$150K

9.6%

$150K-$200K

12.7%

$200K+

14.1%

Employment

3.1% Unemployment Rate State: 3.4%|National: 5.2%

64.5% Labor Force Participation

Housing Overview

Owner 73.5%

Renter 26.5%

Affordability Index Affordable

3.8x home value to income ratio

Median gross rent $1,360/mo 16.8% of median household income annually

People & Demographics

Age Distribution

Under 18

18.4%

18-34

21.6%

35-54

25.1%

55-74

27.1%

75+

7.7%

Race & Ethnicity

Diversity Index

Very Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 24 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Merrimack County

City	Population	Median Income	Poverty	Home Value
Concord	44,375	$84,902	8.9%	$350,900
Franklin	8,799	$71,648	7.0%	$262,200
South Hooksett	5,902	$130,000	4.0%	$433,200
Hooksett	5,876	$101,053	4.0%	$348,100
Suncook	5,432	$79,836	12.9%	$361,100
Tilton Northfield	3,101	$66,705	11.2%	$250,000
Henniker	2,993	$76,326	17.5%	$296,400
Pittsfield	1,744	$60,144	16.6%	$273,100
Contoocook	1,376	$97,928	6.2%	$421,300
New London	1,278	N/A	6.5%	$481,000
Loudon	614	$106,486	5.4%	$410,200
Bradford	404	$84,375	4.0%	$302,300
Warner	341	$47,885	5.9%	$386,400
Blodgett Landing	100	N/A	0.0%	$343,500

Explore New Hampshire Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Merrimack County is located in New Hampshire with a total population of 155,967. It is the 3rd most populous county out of 10 in New Hampshire. The county encompasses 14 Census-designated places.

Age Demographics

The median age in Merrimack County is 42.9 years. This is about the same as the state median of 43.3 years.

Economy, Income & Housing

The median household income in Merrimack County is $97,004. This is 2% lower than the state median of $99,031. It is also 20% higher than the national median of $80,734. The poverty rate stands at 7.6%. This is 5% higher than the state poverty rate of 7.2%. The unemployment rate is 3.1%. This is 7% lower than the state rate of 3.4%. The median home value is $367,600. Housing costs are 9% lower than the state median of $402,500. The home-value-to-income ratio is 3.8x. 73.5% of occupied housing units are owner-occupied.

Race & Ethnicity

Merrimack County has a predominantly White (non-Hispanic) population, comprising 90.1% of all residents. Hispanic or Latino residents account for 2.7%.

Education

38.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 4% lower than the state rate of 40.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.5%. Notably, 16.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All figures for Merrimack County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against New Hampshire and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Merrimack County, New Hampshire?

Merrimack County has a population of 155,967, making it the 3rd most populous county in New Hampshire.

What is the median income in Merrimack County?

The median household income in Merrimack County is $97,004 with a poverty rate of 7.6%.

How many cities are in Merrimack County, New Hampshire?

Merrimack County contains 14 Census-designated places.