| Statistic | Pierre | South Dakota | National |
| Population | 14,450 | 917,029 | 336,919,644 |
| Population density (sq mi) | 1,107 | 12 | 91 |
| Median age | 38.7 | 36.8 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 56% | 59% | 55% |
| Families w/ Kids under 18 | 48% | 44% | 43% |
| Speak English | 96% | 94% | 79% |
| Speak Spanish | 1% | 2% | 13% |

The demographics of Pierre 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 14,450, Pierre exhibits a population density of 1,107 people per square mile, contrasting with the national average of 91. The median age stands at 38.7, with 56% of individuals aged 15 or older being married and 48% having children under 18. In terms of income equality in Pierre, 14% of households report a median income below $25,000, while 15% report an income exceeding $150,000, showcasing a diverse economic landscape.
Recognizing the racial demographics and ethnicity breakdown of Pierre is pivotal for addressing systemic inequities, championing social justice and inclusion and fostering resilient communities. In Pierre, the racial breakdown comprises 83.5% White, 0.1% Black or African American, 0% Asian, 11% American Indian, and 0% Native Hawaiian, with 3.4% of the population identifying as Hispanic or Latino. 95.7% of households reported speaking English only, while 1.2% reported speaking Spanish only. Furthermore, 0.8% of residents were categorized as foreign-born.
Communities such as Pierre, with population densities higher than the average, play a significant role in promoting environmental sustainability by decreasing per capita energy consumption, greenhouse gas emissions and land use. Their compact urban development encourages the adoption of energy-efficient buildings, walking, cycling, and public transportation, fostering sustainable lifestyles and minimizing environmental impact. Additionally, densely populated areas tend to cultivate vibrant social and cultural scenes, fueled by a diverse population that contributes to a myriad of cultural events, festivals and community activities. This cultural diversity sparks creativity, innovation and cross-cultural exchange, enriching the social fabric of the community. Pierre has a population density of 1,107, surpassing the national average of 91 people per square mile, as it stands poised to reap the benefits of dense urban living.
Urban Development: Pierre 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 Pierre demographic data in planning and executing affordable housing initiatives can serve as a preventive measure against displacement.
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 Pierre 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. Pierre 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.
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 Pierre 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.
| Race | Pierre | South Dakota | National |
| White | 83.50% | 84.77% | 73.35% |
| Black | 0.07% | 1.65% | 12.63% |
| Asian | 0.03% | 1.33% | 5.22% |
| American Indian | 11.02% | 8.72% | 0.82% |
| Native Hawaiian | 0.00% | 0.04% | 0.18% |
| Mixed race | 5.35% | 2.61% | 3.06% |
| Other race | 0.04% | 0.88% | 4.75% |