| Statistic | Springfield | Illinois | National |
| Population | 117,426 | 13,081,969 | 336,919,644 |
| Population density (sq mi) | 1,949 | 236 | 91 |
| Median age | 39.9 | 37.4 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 47% | 55% | 55% |
| Families w/ Kids under 18 | 42% | 44% | 43% |
| Speak English | 94% | 77% | 79% |
| Speak Spanish | 2% | 13% | 13% |

Springfield 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 Springfield population is 117,426 and has a population density of 1,949 people per square mile, compared to the national average of 91. The median age of all residents is 39.9, 47% of people 15 years of age or older are married and 42% have kids under the age of 18. In Springfield, 23% of households have a median income that is below $25,000 and 15% of households report a median income above $150,000.
The Springfield racial demographics and ethnicity breakdown serves as a critical tool for understanding and addressing systemic inequities, promoting social justice and inclusion and building stronger, more resilient communities. The racial breakdown in Springfield is 72.3% White, 20.1% Black or African American, 3% Asian, 0.2% American Indian and 0.1% Native Hawaiian - 3.1% of the population identify as Hispanic or Latino. Of all households, 93.9% reported speaking English only, while 2.2% reported speaking Spanish only. A total of 4.2% of residents were considered foreign born.
Communities such as Springfield, 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. Springfield has a population density of 1,949, surpassing the national average of 91 people per square mile, as it stands poised to reap the benefits of dense urban living.
Urban Development: Springfield 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 Springfield 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 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 Springfield 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.
Understanding Populations: The examination and analysis of Springfield demographic data can offer valuable insights into the composition and traits of populations, including age, gender, race, ethnicity, income, education and various socio-economic factors. This understanding is essential for addressing the varied needs, preferences, and challenges faced by different demographic groups within communities. Demographics hold significant importance in understanding populations, guiding decision-making processes and promoting equity, inclusion, and overall well-being for all individuals and communities. The Springfield population data serves as a cornerstone for addressing social, economic and environmental challenges, while also fostering the well-being and resilience of societies.
| Race | Springfield | Illinois | National |
| White | 72.26% | 72.14% | 73.35% |
| Black | 20.12% | 14.30% | 12.63% |
| Asian | 2.96% | 5.10% | 5.22% |
| American Indian | 0.15% | 0.23% | 0.82% |
| Native Hawaiian | 0.08% | 0.03% | 0.18% |
| Mixed race | 4.09% | 2.34% | 3.06% |
| Other race | 0.33% | 5.86% | 4.75% |