Portsmouth, NH Profile: Facts & Data

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Portsmouth, New Hampshire - Basic Facts

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The City of Portsmouth is the 8th largest city in New Hampshire with a population of 22,716 as of July 1, 2021. Portsmouth ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in New Hampshire. See peer rankings below.

The primary coordinate point for Portsmouth is located at latitude 43.0718 and longitude -70.7626 in Rockingham County. The formal boundaries for the City of Portsmouth encompass a land area of 15.64 sq. miles and a water area of 1.21 sq. miles. Rockingham County is in the Eastern time zone (GMT -5). The elevation is 20 feet.

The City of Portsmouth has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Alternate Unofficial Names for Portsmouth: Pascataquack, Piscataqua, Rivertown, Strabery Banke, Strawberry Banck, Strawberry Bancke, Strawberry Bank, Strawberry Banke, Strawberry-bank, Strawbery Banke, The Bank.

Jump to... (On This Page!)
  1. Portsmouth 2021 Demographic Data
  2. Growth Rates for Portsmouth (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. New Hampshire Research Tools (Easy Tools & Current Data)
  3. New Hampshire Data Comparison Tool - 2021 Demographics
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Portsmouth, NH Data & Demographics (As of July 1, 2021)

POPULATION

Total Population 22,716 (100%)
Population in Households 21,883 (96.3%)
Population in Families 13,601 (59.9%)
Population in Group Quarters1 833 ( 3.7%)
Population Density 1,451
Diversity Index2 33
 
 

INCOME

Median Household Income $80,052
Average Household Income $112,863
% of Income for Mortgage4 25%
Per Capita Income $54,134
Wealth Index5 102
 

HOUSING

Total HU (Housing Units) 11,412 (100%)
Owner Occupied HU 5,444 (47.7%)
Renter Occupied HU 5,429 (47.6%)
Vacant Housing Units 539 ( 4.7%)
Median Home Value $467,475
Average Home Value $536,439
Housing Affordability Index3 85
 

HOUSEHOLDS

Total Households 10,873
Average Household Size 2.01
Family Households 4,937
Average Family Size 3
NOTES
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.

GROWTH RATE / YEAR

2010-2021 2021-2026
Population 0.8% 0.76%
Households 0.73% 0.86%
Families 0.37% 0.62%
Median Household Income   2.17%
Per Capita Income   2.22%
Owner Occupied HU   0.7%

Portsmouth, NH - Peer Comparisons by Rank and Percentile

The table below compares Portsmouth to the other 97 incorporated cities, towns and CDPs in New Hampshire by rank and percentile using July 1, 2021 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 8 93rd
Population Density # 17 84th
Median Household Income # 16 85th
Housing Affordability Index # 5 5th
Per Capita Income # 7 94th
Diversity Index # 5 96th

Additional comparisons and rankings can be made with a VERY EASY TO USE New Hampshire Census Data Comparison Tool.

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