Statistic Boulder Colorado National
Population 112,777 5,895,298 336,919,644
Population density (sq mi) 4,292 57 91
Median age 28.8 36.4 37.7
Male/Female ratio 1.1:1 1.0:1 1.0:1
Married (15yrs & older) 34% 56% 55%
Families w/ Kids under 18 43% 45% 43%
Speak English 85% 83% 79%
Speak Spanish 6% 12% 13%
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Overview of Boulder Demographics

Understanding the demographics of Boulder is essential for gaining insights into the composition, dynamics and needs of any city, town or village. This knowledge empowers planners, developers and policymakers to strategize effectively, promoting prosperity, equity and well-being for all residents. The Boulder population is 112,777, with a population density of 4,292 people per square mile, diverging from the national average of 91. The median age is 28.8, and 34% of individuals aged 15 or older are married, while 43% have children under 18. As far as income equality in Boulder, 21% of households have a median income below $25,000, whereas 31% report an income exceeding $150,000, indicating a varied economic landscape within the area.

Boulder Racial Demographics & Ethnicity

The Boulder racial demographics and ethnicity breakdown serves as a critical tool for understanding and addressing systemic inequities, promoting social justice and inclusion and building stronger, more resilient communities. The racial breakdown in Boulder is 86.3% White, 1.1% Black or African American, 5.9% Asian, 0.3% American Indian and 0.1% Native Hawaiian - 10.3% of the population identify as Hispanic or Latino. Of all households, 85.4% reported speaking English only, while 5.7% reported speaking Spanish only. A total of 10.5% of residents were considered foreign born.

Boulder Population Density

High population density areas are renowned for their extensive array of amenities and services, easily accessible to residents within walking distance or a short commute. From healthcare facilities and educational institutions to cultural venues, dining establishments, retail shops and public transportation options, these communities offer convenience and enrichment to their inhabitants. The Boulder population density is 4,292 people per square mile, well above the national average of 91, making it one of the most densely populated cities in the nation.

Why are Demographics Important?

Urban Development: Urban planners can leverage demographics data in Boulder to design and develop areas that cater to residents' needs, spanning housing, transportation, and public services, while prioritizing sustainability and enhancing quality of life. Demographic changes can contribute to gentrification and neighborhood evolution, whether in urban or rural contexts. As neighborhoods attract new residents with diverse income levels and lifestyle preferences, property values may appreciate, potentially displacing longstanding residents and reshaping the neighborhood's identity. Understanding population density, age distribution, household size and income levels is essential for guiding decisions on zoning, transportation infrastructure, housing development and public amenities. Incorporating Boulder demographics data into planning and implementing affordable housing initiatives can help mitigate displacement risks.

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 Boulder 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.

Understanding Populations: By reporting and analyzing Boulder demographics, we can acquire valuable insights into the makeup and traits of populations, encompassing age, gender, race, ethnicity, income, education and various socio-economic factors. This comprehension is vital for tackling the varied needs, preferences, and obstacles encountered by different demographic groups within communities. Demographics serve a pivotal role in comprehending populations, guiding decision-making processes and advancing equity, inclusion and overall well-being for all individuals and communities. The Boulder population data serves as a cornerstone for addressing social, economic and environmental challenges, while also fostering the well-being and strength of communities.

Demographics Quick Facts

  • The population density in Boulder is 7446% higher than Colorado
  • The median age in Boulder is 21% lower than Colorado
  • In Boulder 86.30% of the population is White
  • In Boulder 1.07% of the population is Black
  • In Boulder 5.88% of the population is Asian

Compare Boulder, CO Demographics

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      Boulder racial demographics

      Race Boulder Colorado National
      White 86.30% 84.28% 73.35%
      Black 1.07% 4.09% 12.63%
      Asian 5.88% 2.94% 5.22%
      American Indian 0.28% 0.94% 0.82%
      Native Hawaiian 0.05% 0.14% 0.18%
      Mixed race 4.75% 3.43% 3.06%
      Other race 1.65% 4.18% 4.75%
      In Boulder, 10.3% 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

      Boulder age breakdown

      Marital status

      Age of children in married couples

      Source: The Boulder, CO demographics data displayed above is derived from the United States Census Bureau American Community Survey (ACS) and include 2026 modeled data developed using proprietary methodologies.