| Statistic | Swansea | Illinois | National |
| Population | 14,604 | 13,081,969 | 336,919,644 |
| Population density (sq mi) | 2,266 | 236 | 91 |
| Median age | 42.0 | 37.4 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 62% | 55% | 55% |
| Families w/ Kids under 18 | 39% | 44% | 43% |
| Speak English | 94% | 77% | 79% |
| Speak Spanish | 2% | 13% | 13% |

Swansea 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 Swansea population is 14,604 and has a population density of 2,266 people per square mile, compared to the national average of 91. The median age of all residents is 42, 62% of people 15 years of age or older are married and 39% have kids under the age of 18. In Swansea, 11% of households have a median income that is below $25,000 and 30% of households report a median income above $150,000.
The Swansea 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 Swansea is 72.8% White, 18.5% Black or African American, 2.2% Asian, 0.1% American Indian and 0% Native Hawaiian - 3.3% of the population identify as Hispanic or Latino. Of all households, 94% reported speaking English only, while 2.4% reported speaking Spanish only. A total of 5.8% of residents were considered foreign born.
The Swansea population density comes in at 2,266 people per square mile, which makes it one of the most densely populated areas in the country, far surpassing the national average of 91. Areas characterized by high population density often boast an abundance of amenities and services within close proximity, providing residents with convenient access to healthcare, education, cultural attractions, dining establishments, retail outlets and transportation options. This accessibility could potentially enhance residents' overall quality of life and well-being.
Urban Development: Urban planners could use Swansea demographic data to design and create areas that accommodate the needs of residents, including housing, transportation and public services, while promoting sustainability and quality of life. Demographic shifts can contribute to gentrification and neighborhood change in urban or rural areas. As neighborhoods attract new residents with different income levels and lifestyle preferences, property values may rise, leading to displacement of long-time residents and changes in the character and identity of the neighborhood. Understanding population density, age distribution, household size and income levels helps inform decisions related to zoning, transportation infrastructure, housing development and public amenities. Lastly, using Swansea demographics for planning and development of affordable housing can help prevent displacement.
Healthcare Planning: The analysis of Swansea demographics can offer insights into healthcare planning and delivery, identifying population health needs, disparities and risk factors. By understanding demographic trends, healthcare providers and policymakers can allocate resources effectively, develop prevention and intervention programs and address health inequities within communities. Through the use of demographic data and statistics, healthcare providers and policymakers aim to achieve equitable, accessible and high-quality healthcare for all individuals and communities. This proactive approach to healthcare planning ensures targeted interventions, efficient resource allocation and customized healthcare services to meet the diverse needs of populations.
Education Allocation: Education planning benefits significantly from Swansea demographic information, which helps identify student demographics, school enrollment trends, and educational needs. This data assists schools and policymakers in allocating resources effectively and devising impactful educational programs. It serves as a vital tool for recognizing disparities in educational access and outcomes among diverse 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 improve access, support, and outcomes for marginalized students. Ultimately, Swansea demographic data is essential in education for advancing equity, fostering student success, and cultivating inclusive learning environments tailored to meet the needs of all students.
| Race | Swansea | Illinois | National |
| White | 72.80% | 72.14% | 73.35% |
| Black | 18.50% | 14.30% | 12.63% |
| Asian | 2.21% | 5.10% | 5.22% |
| American Indian | 0.06% | 0.23% | 0.82% |
| Native Hawaiian | 0.00% | 0.03% | 0.18% |
| Mixed race | 4.99% | 2.34% | 3.06% |
| Other race | 1.44% | 5.86% | 4.75% |