Merrimack County NH Information

Merrimack County NH: Information Overview

The Merrimack County Section of the New Hampshire gazetteer has 6 main navigation sections:

  1. The Data section (this page) contains current Demographic Information and a Peer Comparsion Table that shows how Merrimack County ranks in comparison to its peer group of New Hampshire Counties.
  2. The Cities section lists the incorporated cities, towns, villiages, boroughs and Census Designated Places (CDPs) within Merrimack County in the first section and other populated places in the second section.
  3. The Maps section displays a Merrimack County Boundary Map.
  4. The ZIP Codes section lists Standard ZIP Codes, Unique - Single Entity ZIP Codes and PO Box ZIP Codes for Merrimack County and displays them on an interactive map. This page also lists the Default (Preferred) City Names associated with Merrimack County ZIP Codes by the U.S. Postal Service. The top-level page in the ZIP Code section of the New Hampshire gazetteer has search tools to: 1. find the city associated with a particular ZIP Code, and 2. find all the ZIP Codes for a particular city. It also has a tool that tells you which New Hampshire Counties use a particular Area Code.
  5. The Features section lists the Physical Features, Cultural Features and Historic Features in Merrimack County listed by the USGS in the Geographic Name Information System (GNIS). Physical Features are the natural features of the Earth's surface. Cultural Features are landscape features that were created or shaped by humans. Historical Features are features that no longer exist on the landscape.
  6. The Schools section has School Profiles for both public and private Merrimack County schools. The School Profiles have enrollment information and the profiles for the public schools include an attendance zone map (where applicable). In the top-level page of the school section of the New Hampshire gazetteer, you can also search for profiles of all New Hampshire Public and Private Schools by School Name, City, County or ZIP Code.
  7. The Land section lists farm land, acreage and property for sale in Merrimack County.

Merrimack County NH Data & Demographics (As of July 1, 2014)


Total Population 147,608
Population in Households 141,273
Population in Familes 112,273
Population in Group Qrtrs 6,335
Population Density1 158
Diversity Index2 14


Total Households 57,961
Average Household Size 2.44
Family Households 38,455
Average Family Size 3


Total Housing Units 64,826 (100%)
Owner Occupied HU 40,483 (62.4%)
Renter Occupied HU 17,478 (27.0%)
Vacant Housing Units 6,865 (10.6%)
Median Home Value $221,672
Average Home Value $242,861


Median Household Income $65,057
Average Household Income $81,847
Per Capita Income $32,296
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population 0.19% 0.18%
Households 0.37% 0.24%
Families 0.22% 0.14%
Median Household Income   3.38%
Per Capita Income   2.77%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


Merrimack County NH: Peer Comparison by Rank and Percentile (As of July 1, 2014)

The table below compares Merrimack County to the other 10 counties and county equivalents in New Hampshire by rank and percentile. The place with the highest value is ranked # 1. Percentile example: a location that ranks higher than 25% of its peers would be in the 25th percentile of the peer group.

Try our VERY EASY TO USE New Hampshire Census Data Comparison Tool that allows you to compare and rank key demographic data 60 different ways!

Rank Percentile
Total Population # 3 80th
Population Density1 # 4 70th
Diversity Index2 # 5 60th
Median Household Income # 3 80th
Per Capita Income # 3 80th
Information Updates

The Demographic Data for the 603 New Hampshire cities, towns, counties, ZIP Codes and Census Designated Places (CDPs) profiled in this gazetteer is updated annually. Last Update: July 1, 2014.

The ZIP Code maps and the data regarding the number of residential and business addresses in each ZIP Code are updated four times per year. Last Update: August 1, 2014.

The information on the 14,360 New Hampshire Physical, Cultural and Historic Features is updated six times per year. Last Update: August 2, 2014.

The School Attendance Zone Maps are updated four times per year. Last Update: July 8, 2014.