| Statistic | St. Peters | Missouri | National |
| Population | 57,536 | 6,137,428 | 328,239,523 |
| Population density (sq mi) | 2,562 | 90 | 91 |
| Median age | 39.9 | 38.3 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 62% | 57% | 55% |
| Families w/ Kids under 18 | 43% | 42% | 43% |
| Speak English | 95% | 94% | 79% |
| Speak Spanish | 2% | 3% | 13% |
St. Peters 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 St. Peters population is 57,536 and has a population density of 2,562 people per square mile, compared to the national average of 91. The median age of all residents is 39.9, 62% of people 15 years of age or older are married and 43% have kids under the age of 18. In St. Peters, 12% of households have a median income that is below $25,000 and 24% of households report a median income above $150,000.
Recognizing the racial demographics and ethnicity breakdown of St. Peters is pivotal for addressing systemic inequities, championing social justice and inclusion and fostering resilient communities. In St. Peters, the racial breakdown comprises 88.8% White, 5.1% Black or African American, 2.5% Asian, 0.3% American Indian, and 0% Native Hawaiian, with 2.8% of the population identifying as Hispanic or Latino. 95.1% of households reported speaking English only, while 1.7% reported speaking Spanish only. Furthermore, 3.4% of residents were categorized as 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. St. Peters has a population density of 2,562 people per square mile, which far exceeds the national average of 91 and ranks among the most densely populated cities in the country.
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 St. Peters 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: St. Peters 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. Peters demographic data in planning and executing affordable housing initiatives can serve as a preventive measure against displacement.
Education Allocation: Utilizing census data like St. Peters 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. Peters 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.
| Race | St. Peters | Missouri | National |
| White | 88.80% | 82.53% | 73.35% |
| Black | 5.13% | 11.58% | 12.63% |
| Asian | 2.53% | 1.78% | 5.22% |
| American Indian | 0.27% | 0.42% | 0.82% |
| Native Hawaiian | 0.00% | 0.11% | 0.18% |
| Mixed race | 3.05% | 2.44% | 3.06% |
| Other race | 0.22% | 1.13% | 4.75% |
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