Statistic Portsmouth New Hampshire National
Population 21,418 1,359,711 328,239,523
Population density (sq mi) 1,368 153 91
Median age 41.5 42.4 37.7
Male/Female ratio 0.9:1 1.0:1 1.0:1
Married (15yrs & older) 52% 58% 55%
Families w/ Kids under 18 36% 40% 43%
Speak English 90% 92% 79%
Speak Spanish 1% 2% 13%

Overview of Portsmouth Demographics

The population of Portsmouth is 21,418, with a population density of 1,368 people per square mile, diverging from the national average of 91. The median age is 41.5 and 52% of individuals aged 15 or older are married, while 36% have children under 18. As far as income equality in Portsmouth goes, 13% of households have a median income below $25,000, whereas 29% report an income exceeding $150,000. The Portsmouth demographics data can provide indispensable insights into the composition, dynamics and needs of cities, towns or even villages, empowering planners, developers and policymakers to devise strategies that foster prosperity, equity and well-being for all residents.

Portsmouth Racial Demographics & Ethnicity

The 5 largest ethnic groups in Portsmouth are 89.5% White, 2% Black or African American, 4.8% Asian, 0% American Indian and 0% Native Hawaiian, with 2.4% of the population identifying as Hispanic or Latino. Of note, 90.4% of households reported speaking English only, while 1.3% reported speaking Spanish only. Additionally, 7.9% of residents were classified as foreign-born. The Portsmouth racial demographics and ethnicity breakdown are essential for comprehending and addressing systemic inequities, advancing social justice and inclusion and cultivating resilient communities.

Portsmouth Population Density

Portsmouth has a population density that is well above-average, which plays a pivotal role in promoting environmental sustainability by reducing per capita energy consumption, greenhouse gas emissions and land use. Its compact urban development encourages energy-efficient buildings, active transportation modes like walking and cycling and the utilization of public transit, fostering sustainable lifestyles and mitigating environmental impact. Additionally, the area's dense population contributes to a vibrant social and cultural scene, featuring a diverse array of cultural events, festivals and community activities. This cultural diversity fuels creativity, innovation and cross-cultural exchange, enhancing the community's social fabric. Portsmouth has a population density of 1,368 people per square mile, exceeding the national average of 91 and positions itself in a good spot to reap the benefits of densely populated areas.

Why are Demographics Important?

Social Cohesion: The examination and interpretation of demographics are pivotal for nurturing social cohesion and promoting understanding among diverse communities. By acknowledging and honoring differences in Portsmouth demographics, societies can champion inclusivity, diversity and social cohesion while addressing social disparities and advocating for equitable opportunities. Racial demographics can potentially showcase the diversity of a population and are crucial for fostering inclusive and embracing communities. Embracing diversity fortifies social bonds, fosters cultural appreciation and enriches society by celebrating the contributions of individuals from diverse racial and ethnic backgrounds.

Urban Development: By leveraging demographic data in Portsmouth, urban planners can tailor areas to meet the needs of any resident across housing, transportation and public services, all while fostering sustainability and elevating quality of life. Demographic changes can fuel gentrification and neighborhood transformation, whether in urban or rural settings. As neighborhoods attract newcomers with varying income levels and lifestyle preferences, property values may appreciate, potentially displacing established residents and reshaping the neighborhood's fabric. A nuanced understanding of population density, age distribution, household size and income levels is pivotal for guiding decisions on zoning, transportation infrastructure, housing development and public amenities. Utilizing the demographic data in planning and implementing affordable housing initiatives can help mitigate displacement risks and promote inclusive communities.

Healthcare Planning: By analyzing the Portsmouth demographic data, it can potentially inform healthcare planning and delivery by identifying population health needs, disparities, and risk factors. Understanding demographic trends helps healthcare providers and policymakers allocate resources, develop prevention and intervention programs, and address health inequities within communities. By leveraging demographic data, healthcare providers and policymakers can work towards achieving equitable, accessible, and high-quality healthcare for all individuals and communities. This proactive approach to healthcare planning ensures that interventions are targeted, resources are allocated efficiently, and healthcare services are tailored to meet the diverse needs of populations.

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Demographics Quick Facts

  • The population density in Portsmouth is 794% higher than New Hampshire
  • The median age in Portsmouth is 2% lower than New Hampshire
  • In Portsmouth 89.54% of the population is White
  • In Portsmouth 2.02% of the population is Black
  • In Portsmouth 4.84% of the population is Asian

Compare Portsmouth, NH Demographics

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      Portsmouth racial demographics

      Race Portsmouth New Hampshire National
      White 89.54% 93.68% 73.35%
      Black 2.02% 1.32% 12.63%
      Asian 4.84% 2.42% 5.22%
      American Indian 0.00% 0.16% 0.82%
      Native Hawaiian 0.00% 0.02% 0.18%
      Mixed race 2.66% 1.88% 3.06%
      Other race 0.95% 0.54% 4.75%
      In Portsmouth, 2.4% of people are of Hispanic or Latino origin.
      Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

      Household income distribution

      Place of birth by citizenship

      Portsmouth age breakdown

      Marital status

      Age of children in married couples

      Source: The Portsmouth, NH demographics data displayed above is derived from the United States Census Bureau American Community Survey (ACS).