| Statistic | Marion | Iowa | National |
| Population | 39,910 | 3,155,070 | 328,239,523 |
| Population density (sq mi) | 2,242 | 57 | 91 |
| Median age | 38.0 | 38.0 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 62% | 60% | 55% |
| Families w/ Kids under 18 | 48% | 44% | 43% |
| Speak English | 97% | 92% | 79% |
| Speak Spanish | 1% | 4% | 13% |
Marion demographics provide invaluable insights into the composition, dynamics and needs of urban and rural areas, enabling them to plan, develop, and govern in ways that promote prosperity, equity and well-being for all residents. The Marion population is 39,910 and has a population density of 2,242 people per square mile, compared to the national average of 91. The median age of all residents is 38, 62% of people 15 years of age or older are married and 48% have kids under the age of 18. In Marion, 11% of households have a median income that is below $25,000 and 24% of households report a median income above $150,000.
The Marion 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 Marion is 93.4% White, 1.8% Black or African American, 1.3% Asian, 0.4% American Indian and 0.1% Native Hawaiian - 3.3% of the population identify as Hispanic or Latino. Of all households, 96.9% reported speaking English only, while 1.4% reported speaking Spanish only. A total of 2.2% of residents were considered foreign born.
In areas with high population density, residents enjoy a wealth of amenities and services conveniently located within walking distance or a short commute. Access to healthcare facilities, educational institutions, cultural venues, dining options, retail stores and public transit enhances residents' quality of life and overall well-being. Marion has a population density of 2,242 people per square mile, which far exceeds the national average of 91 and ranks among the most densely populated cities in the country.
Understanding Populations: The examination and analysis of Marion demographic data can offer valuable insights into the composition and traits of populations, including age, gender, race, ethnicity, income, education and various socio-economic factors. This understanding is essential for addressing the varied needs, preferences, and challenges faced by different demographic groups within communities. Demographics hold significant importance in understanding populations, guiding decision-making processes and promoting equity, inclusion, and overall well-being for all individuals and communities. The Marion population data serves as a cornerstone for addressing social, economic and environmental challenges, while also fostering the well-being and resilience of societies.
Policy Planning: Demographic data and statistics serve as valuable tools for guiding policy and decision-making processes across government entities, organizations, and businesses. Through the analysis and interpretation of Marion demographics, policymakers, government officials and organizational leaders can identify areas requiring attention, allocate resources strategically and develop policies and initiatives that cater to the unique needs and preferences of various demographic groups. Marion demographic statistics can play a critical role in policy planning by informing resource allocation, enabling evidence-based decision-making, identifying priority areas, forecasting future trends, monitoring policy outcomes and fostering equity and inclusivity. By harnessing this data effectively, policymakers can craft policies that are targeted, efficient and equitable, thereby addressing the diverse needs of communities.
Urban Development: Marion demographic statistics are invaluable for urban planners in designing and developing areas that cater to residents' needs, encompassing housing, transportation, and public services, all while fostering sustainability and enhancing quality of life. Shifts in demographics can influence gentrification and neighborhood transformation, whether in urban or rural settings. As neighborhoods attract new residents with varying income levels and lifestyle preferences, property values may increase, potentially displacing long-term residents and altering the neighborhood's character. Analyzing population density, age distribution, household size, and income levels is crucial for guiding decisions regarding zoning, transportation infrastructure, housing expansion and public amenities. Utilizing Marion demographic data in planning and executing affordable housing initiatives can serve as a preventive measure against displacement.
| Race | Marion | Iowa | National |
| White | 93.40% | 90.90% | 73.35% |
| Black | 1.83% | 3.32% | 12.63% |
| Asian | 1.35% | 2.14% | 5.22% |
| American Indian | 0.38% | 0.32% | 0.82% |
| Native Hawaiian | 0.06% | 0.08% | 0.18% |
| Mixed race | 2.77% | 1.97% | 3.06% |
| Other race | 0.22% | 1.27% | 4.75% |
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