| Statistic | Eureka | Kansas | National |
| Population | 2,280 | 3,026,509 | 336,919,644 |
| Population density (sq mi) | 1,001 | 37 | 91 |
| Median age | 44.3 | 36.2 | 37.7 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 56% | 59% | 55% |
| Families w/ Kids under 18 | 46% | 45% | 43% |
| Speak English | 96% | 89% | 79% |
| Speak Spanish | 2% | 8% | 13% |

Understanding the demographics of Eureka is essential for gaining insights into the composition, dynamics and needs of any city, town or village. This knowledge empowers planners, developers and policymakers to strategize effectively, promoting prosperity, equity and well-being for all residents. The Eureka population is 2,280, with a population density of 1,001 people per square mile, diverging from the national average of 91. The median age is 44.3, and 56% of individuals aged 15 or older are married, while 46% have children under 18. As far as income equality in Eureka, 26% of households have a median income below $25,000, whereas 8% report an income exceeding $150,000, indicating a varied economic landscape within the area.
Recognizing the racial demographics and ethnicity breakdown of Eureka is pivotal for addressing systemic inequities, championing social justice and inclusion and fostering resilient communities. In Eureka, the racial breakdown comprises 92.4% White, 0.5% Black or African American, 1% Asian, 0.5% American Indian, and 0% Native Hawaiian, with 5.2% of the population identifying as Hispanic or Latino. 96.4% of households reported speaking English only, while 2.1% reported speaking Spanish only. Furthermore, 1.2% of residents were categorized as foreign-born.
Eureka has a population density that is well above-average, which 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. Eureka has a population density of 1,001 people per square mile, exceeding the national average of 91 and positions itself in a good spot to reap the benefits of densely populated areas.
Understanding Populations: By delving into and analyzing the Eureka demographic stats, we can uncover insightful details regarding the composition and attributes of populations, spanning age, gender, race, ethnicity, income, education and other socio-economic indicators. This comprehension is vital for addressing the diverse needs, preferences and hurdles faced by various demographic groups within communities. Demographics wield significant influence in understanding populations, shaping decision-making processes and championing equity, inclusion, and the overall welfare of all individuals and communities. The Eureka population and demographic data serves as a cornerstone for tackling social, economic and environmental challenges, while simultaneously nurturing the well-being and resilience of societies.
Urban Development: Urban planners could use Eureka 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 Eureka demographics for planning and development of affordable housing can help prevent 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 Eureka 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.
| Race | Eureka | Kansas | National |
| White | 92.38% | 85.19% | 73.35% |
| Black | 0.45% | 5.79% | 12.63% |
| Asian | 1.04% | 2.68% | 5.22% |
| American Indian | 0.45% | 0.82% | 0.82% |
| Native Hawaiian | 0.00% | 0.06% | 0.18% |
| Mixed race | 4.74% | 3.31% | 3.06% |
| Other race | 0.95% | 2.15% | 4.75% |