| Statistic | St. John | Missouri | National |
| Population | 6,369 | 6,137,428 | 328,239,523 |
| Population density (sq mi) | 4,471 | 90 | 91 |
| Median age | 38.2 | 38.3 | 37.7 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 54% | 57% | 55% |
| Families w/ Kids under 18 | 39% | 42% | 43% |
| Speak English | 89% | 94% | 79% |
| Speak Spanish | 5% | 3% | 13% |
Understanding the demographics of St. John 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 St. John population is 6,369, with a population density of 4,471 people per square mile, diverging from the national average of 91. The median age is 38.2, and 54% of individuals aged 15 or older are married, while 39% have children under 18. As far as income equality in St. John, 24% of households have a median income below $25,000, whereas 10% report an income exceeding $150,000, indicating a varied economic landscape within the area.
The St. John racial demographics and ethnicity breakdown could be indispensable tools for recognizing and rectifying systemic inequities, fostering social justice and inclusion and cultivating resilient communities. In St. John, the racial breakdown reveals 63.6% White, 28.5% Black or African American, 4% Asian, 0% American Indian and 0% Native Hawaiian, with 6.6% of the population identifying as Hispanic or Latino. Of all households, 89.2% reported speaking English only, while 5% reported speaking Spanish only. Moreover, 6.2% of residents were classified as foreign-born.
Areas with a high population density tend to support a wide range of amenities and services within walking distance or a short commute. Residents tend to have convenient access to healthcare facilities, educational institutions, cultural venues, restaurants, shops and public transportation options, enhancing their quality of life and overall well-being. The St. John population density is 4,471 people per square mile, which is well-above the national average of 91 and is considered one of the most densely populated cities in the country.
Healthcare Planning: Analyzing the demographic data in St. John has the potential to inform healthcare planning and delivery by identifying population health needs, disparities and risk factors. Healthcare providers and policymakers can allocate resources more effectively, develop prevention and intervention programs and address health inequities within communities by understanding demographic trends. Leveraging demographic statistics can enable healthcare providers and policymakers to strive for equitable, accessible and high-quality healthcare for all individuals and communities. This proactive healthcare planning approach ensures targeted interventions, efficient resource allocation and tailored healthcare services to meet diverse population needs.
Social Cohesion: Analyzing demographics is vital for nurturing social cohesion and fostering understanding among diverse communities. By embracing and respecting variations in St. John demographics, societies can advance inclusivity, diversity and social unity while combatting social inequalities and advocating for equal opportunities. Racial demographics mirror the diversity within a population and can be instrumental in cultivating inclusive and inviting communities. Embracing diversity strengthens social bonds, fosters cultural appreciation and enriches society by acknowledging the contributions of individuals from various racial and ethnic backgrounds.
Urban Development: Urban planners could use St. John demographic data to design and create areas that accommodate the needs of residents, including housing, transportation and public services, while promoting sustainability and quality of life. Demographic shifts can contribute to gentrification and neighborhood change in urban or rural areas. As neighborhoods attract new residents with different income levels and lifestyle preferences, property values may rise, leading to displacement of long-time residents and changes in the character and identity of the neighborhood. Understanding population density, age distribution, household size and income levels helps inform decisions related to zoning, transportation infrastructure, housing development and public amenities. Lastly, using St. John demographics for planning and development of affordable housing can help prevent displacement.
| Race | St. John | Missouri | National |
| White | 63.59% | 82.53% | 73.35% |
| Black | 28.51% | 11.58% | 12.63% |
| Asian | 4.04% | 1.78% | 5.22% |
| American Indian | 0.00% | 0.42% | 0.82% |
| Native Hawaiian | 0.00% | 0.11% | 0.18% |
| Mixed race | 3.12% | 2.44% | 3.06% |
| Other race | 0.74% | 1.13% | 4.75% |
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