| Statistic | Altadena | California | National |
| Population | 43,037 | 39,512,223 | 328,239,523 |
| Population density (sq mi) | 5,084 | 256 | 91 |
| Median age | 45.4 | 36.0 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 57% | 52% | 55% |
| Families w/ Kids under 18 | 34% | 46% | 43% |
| Speak English | 65% | 56% | 79% |
| Speak Spanish | 23% | 29% | 13% |
Understanding the demographics of Altadena 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 Altadena population is 43,037, with a population density of 5,084 people per square mile, diverging from the national average of 91. The median age is 45.4, and 57% of individuals aged 15 or older are married, while 34% have children under 18. As far as income equality in Altadena, 11% of households have a median income below $25,000, whereas 40% report an income exceeding $150,000, indicating a varied economic landscape within the area.
Recognizing the racial demographics and ethnicity breakdown of Altadena is pivotal for addressing systemic inequities, championing social justice and inclusion and fostering resilient communities. In Altadena, the racial breakdown comprises 53.2% White, 19.7% Black or African American, 5.2% Asian, 0.6% American Indian, and 0.1% Native Hawaiian, with 29.5% of the population identifying as Hispanic or Latino. 64.7% of households reported speaking English only, while 22.6% reported speaking Spanish only. Furthermore, 23% of residents were categorized as foreign-born.
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 Altadena population density is 5,084 people per square mile, well above the national average of 91, making it one of the most densely populated cities in the nation.
Policy Planning: Demographic data and statistics serve as vital tools for informing policy and decision-making processes across various levels of government, as well as within organizations and businesses. Through the reporting and analysis of demographic data, policymakers, government officials, and organizational leaders can pinpoint areas of need, allocate resources efficiently, and craft tailored policies and programs to address the unique needs and priorities of different demographic groups. The utilization of demographic data in Altadena is instrumental in policy planning, facilitating resource allocation, evidence-based decision-making, priority identification, trend forecasting, policy impact assessment, and the promotion of equity and inclusion. By harnessing this data effectively, policymakers can devise targeted, impactful, and inclusive policies that cater to the diverse needs of communities.
Urban Development: By leveraging demographic data in Altadena, 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.
Social Cohesion: The analysis and understanding of demographics are essential for promoting social cohesion and fostering appreciation among diverse communities. By embracing and acknowledging differences in Altadena demographics, societies can promote inclusivity, diversity and social harmony while addressing social inequalities and advocating for equal opportunities. Racial demographics can reflect the diversity within a population and are instrumental in fostering inclusive and welcoming communities. Embracing ethnic diversity strengthens social connections, promotes cultural understanding and enriches society by celebrating the contributions of individuals from diverse racial and ethnic backgrounds.
| Race | Altadena | California | National |
| White | 53.18% | 61.26% | 73.35% |
| Black | 19.67% | 5.85% | 12.63% |
| Asian | 5.16% | 13.85% | 5.22% |
| American Indian | 0.64% | 0.74% | 0.82% |
| Native Hawaiian | 0.10% | 0.39% | 0.18% |
| Mixed race | 6.94% | 4.62% | 3.06% |
| Other race | 14.31% | 13.28% | 4.75% |
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