| Statistic | Belleville | Kansas | National |
| Population | 1,961 | 3,026,509 | 336,919,644 |
| Population density (sq mi) | 1,075 | 37 | 91 |
| Median age | 39.7 | 36.2 | 37.7 |
| Male/Female ratio | 0.8:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 74% | 59% | 55% |
| Families w/ Kids under 18 | 47% | 45% | 43% |
| Speak English | 98% | 89% | 79% |
| Speak Spanish | 2% | 8% | 13% |

Belleville 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 Belleville population is 1,961 and has a population density of 1,075 people per square mile, compared to the national average of 91. The median age of all residents is 39.7, 74% of people 15 years of age or older are married and 47% have kids under the age of 18. In Belleville, 26% of households have a median income that is below $25,000 and 6% of households report a median income above $150,000.
The Belleville 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 Belleville is 96.8% White, 2.2% Black or African American, 0.5% Asian, 0% American Indian and 0% Native Hawaiian - 4.8% of the population identify as Hispanic or Latino. Of all households, 98.2% reported speaking English only, while 1.8% reported speaking Spanish only. A total of 1.9% of residents were considered foreign born.
Belleville, characterized by above-average population density, plays a pivotal role in promoting environmental sustainability by reducing per capita energy consumption, greenhouse gas emissions and land use. Its compact urban development encourages energy-efficient buildings, active transportation modes like walking and cycling and the utilization of public transit, fostering sustainable lifestyles and mitigating environmental impact. Additionally, the area's dense population contributes to a vibrant social and cultural scene, featuring a diverse array of cultural events, festivals and community activities. This cultural diversity fuels creativity, innovation, and cross-cultural exchange, enhancing the community's social fabric. The Belleville population density stands at 1,075, exceeding the national average, at 91 people per square mile, positioning it in a nice position to reap the benefits of densely populated areas.
Policy Planning: Demographic data and statistics play a fundamental role in informing policy and decision-making processes across government entities, organizations and businesses. Through the analysis and interpretation of Belleville demographic data, policymakers, government officials, and organizational leaders can pinpoint areas of concern, allocate resources efficiently, and devise policies and initiatives tailored to the specific needs and preferences of distinct demographic groups. The utilization of demographics in Belleville can be crucial in policy planning, facilitating evidence-based decision-making, identifying key priorities, forecasting future trends, monitoring policy outcomes and advancing principles of equity and inclusion. By harnessing this data effectively, policymakers can develop policies that are targeted, effective and inclusive, thus meeting the diverse needs of communities.
Understanding Populations: The examination and analysis of Belleville 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 Belleville population data serves as a cornerstone for addressing social, economic and environmental challenges, while also fostering the well-being and resilience of societies.
Social Cohesion: The analysis and understanding of demographics are essential for promoting social cohesion and fostering appreciation among diverse communities. By embracing and acknowledging differences in Belleville demographics, societies can promote inclusivity, diversity and social harmony while addressing social inequalities and advocating for equal opportunities. Racial demographics can reflect the diversity within a population and are instrumental in fostering inclusive and welcoming communities. Embracing ethnic diversity strengthens social connections, promotes cultural understanding and enriches society by celebrating the contributions of individuals from diverse racial and ethnic backgrounds.
| Race | Belleville | Kansas | National |
| White | 96.77% | 85.19% | 73.35% |
| Black | 2.17% | 5.79% | 12.63% |
| Asian | 0.48% | 2.68% | 5.22% |
| American Indian | 0.00% | 0.82% | 0.82% |
| Native Hawaiian | 0.00% | 0.06% | 0.18% |
| Mixed race | 0.58% | 3.31% | 3.06% |
| Other race | 0.00% | 2.15% | 4.75% |