| Statistic | St. Johns | Michigan | National |
| Population | 8,087 | 10,338,247 | 336,919,644 |
| Population density (sq mi) | 2,091 | 183 | 91 |
| Median age | 39.1 | 39.5 | 37.7 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 54% | 55% | 55% |
| Families w/ Kids under 18 | 41% | 41% | 43% |
| Speak English | 98% | 91% | 79% |
| Speak Spanish | 0% | 3% | 13% |

The demographics of St. Johns offer invaluable insights into the composition, dynamics and needs of both urban and rural areas, empowering planners, developers and policymakers to foster prosperity, equity, and well-being for all residents. With a population of 8,087, St. Johns exhibits a population density of 2,091 people per square mile, contrasting with the national average of 91. The median age stands at 39.1, with 54% of individuals aged 15 or older being married and 41% having children under 18. In terms of income equality in St. Johns, 18% of households report a median income below $25,000, while 14% report an income exceeding $150,000, showcasing a diverse economic landscape.
The 5 largest ethnic groups in St. Johns are 95.8% White, 1.8% Black or African American, 0.4% Asian, 0.1% American Indian and 0% Native Hawaiian, with 1.4% of the population identifying as Hispanic or Latino. Of note, 98.2% of households reported speaking English only, while 0.1% reported speaking Spanish only. Additionally, 1.6% of residents were classified as foreign-born. The St. Johns racial demographics and ethnicity breakdown are essential for comprehending and addressing systemic inequities, advancing social justice and inclusion and cultivating resilient communities.
High population density areas typically offer a diverse array of amenities and services within walking distance or a short commute, enriching residents' quality of life and well-being. Accessible healthcare facilities, educational institutions, cultural venues, restaurants, shopping and public transportation options contribute to the convenience and vibrancy of these communities. The population density of of St. Johns is 2,091 people per square mile, which far exceeds the national average of 91 and ranks among the most densely populated cities in the nation.
Urban Development: Urban planners can leverage demographics data in St. Johns 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 St. Johns demographics data into planning and implementing affordable housing initiatives can help mitigate displacement risks.
Social Cohesion: Reporting and analyzing demographics can play a crucial role in fostering social cohesion and understanding among diverse communities. By recognizing and appreciating differences in St. Johns demographics, societies can promote inclusivity, diversity and social harmony, while addressing social disparities and promoting equal opportunities for all individuals. Racial demographics reflect the diversity of a population and contribute to fostering inclusive and welcoming communities. Embracing diversity strengthens social cohesion, promotes cultural understanding and enriches the fabric of society by celebrating the contributions of individuals from different racial and ethnic backgrounds.
Understanding Populations: By reporting and analyzing St. Johns 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 St. Johns population data serves as a cornerstone for addressing social, economic and environmental challenges, while also fostering the well-being and strength of communities.
| Race | St. Johns | Michigan | National |
| White | 95.78% | 78.89% | 73.35% |
| Black | 1.84% | 13.89% | 12.63% |
| Asian | 0.39% | 2.79% | 5.22% |
| American Indian | 0.08% | 0.53% | 0.82% |
| Native Hawaiian | 0.00% | 0.03% | 0.18% |
| Mixed race | 1.91% | 2.74% | 3.06% |
| Other race | 0.00% | 1.12% | 4.75% |