| Statistic | St. John | Indiana | National |
| Population | 18,872 | 6,996,062 | 336,919,644 |
| Population density (sq mi) | 1,518 | 195 | 91 |
| Median age | 44.3 | 37.4 | 37.7 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 71% | 56% | 55% |
| Families w/ Kids under 18 | 35% | 43% | 43% |
| Speak English | 92% | 92% | 79% |
| Speak Spanish | 4% | 5% | 13% |
The population in St. John is 18,872, while the population density is 1,518 people per square mile, contrasting with the national average of 91. The median age stands at 44.3, with 71% of individuals aged 15 or older being married and 35% having children under 18. In terms of household income equality in St. John, 5% of households report a median income below $25,000, while 41% report an income exceeding $150,000. The St. John demographics data can provide invaluable insight into the composition, dynamics and needs of urban and rural areas, enabling planners, developers and policymakers to strategize effectively for the promotion of prosperity, equity and well-being for all residents in the area.
Recognizing the racial demographics and ethnicity breakdown of St. John is pivotal for addressing systemic inequities, championing social justice and inclusion and fostering resilient communities. In St. John, the racial breakdown comprises 85.1% White, 2.3% Black or African American, 1.8% Asian, 0% American Indian, and 0.1% Native Hawaiian, with 10.8% of the population identifying as Hispanic or Latino. 91.9% of households reported speaking English only, while 4.3% reported speaking Spanish only. Furthermore, 4.4% of residents were categorized as foreign-born.
Areas like St. John that have a higher than average population density tend to support environmental sustainability by reducing per capita energy consumption, greenhouse gas emissions and land use. Compact urban development encourages energy-efficient buildings, walking, cycling and the use of public transit, promoting sustainable lifestyles and reducing environmental impact. Densely populated areas also tend to have more vibrant social and cultural scenes, with a diverse population contributing to a wide array of cultural events, festivals and community activities. This diversity fosters creativity, innovation and cross-cultural exchange, enriching the social fabric of the community. The St. John population density is higher than average and comes in at 1,518 people per square mile (compared to the nationwide average of 91), putting it in a position to take advantage of all the benefits of a densely populated area.
Urban Development: St. John 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 St. John demographic data in planning and executing affordable housing initiatives can serve as a preventive measure against displacement.
Education Allocation: Utilizing census data like St. John demographics can be useful in guiding education planning, as it helps identify student demographics, school enrollment trends and educational needs. This data assists schools and policymakers in allocating resources and devising effective educational programs. It serves as a vital tool for recognizing disparities in educational access and outcomes among various demographic groups, including racial and ethnic minorities, socio-economic status and students with disabilities. By disaggregating data based on demographic factors, education planners can pinpoint areas of inequity and implement targeted interventions to enhance access, support and outcomes for marginalized students. In essence, St. John demographic statistics can play an indispensable role in education by promoting equity, bolstering student success and cultivating inclusive learning environments tailored to meet the needs of all students.
Policy Planning: Demographic data and statistics can inform policy and decision-making processes at various levels of government, as well as in organizations and businesses. By reporting and analyzing St. John demographics data, policymakers, government officials and organizational leaders can identify areas of need, allocate resources effectively and develop targeted policies and programs that address the specific needs and priorities of different demographic groups. St. John demographics can play a crucial role in policy planning by informing resource allocation, evidence-based decision making, identifying priorities, forecasting future trends, monitoring policy impact and promoting equity and inclusion. By leveraging this data effectively, policymakers can develop policies that are targeted, effective and responsive to the needs of diverse communities.
| Race | St. John | Indiana | National |
| White | 85.09% | 83.99% | 73.35% |
| Black | 2.33% | 9.23% | 12.63% |
| Asian | 1.83% | 1.98% | 5.22% |
| American Indian | 0.00% | 0.24% | 0.82% |
| Native Hawaiian | 0.10% | 0.04% | 0.18% |
| Mixed race | 4.15% | 2.22% | 3.06% |
| Other race | 6.50% | 2.30% | 4.75% |
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