| Statistic | Lewistown | Montana | National |
| Population | 6,107 | 1,097,879 | 336,919,644 |
| Population density (sq mi) | 1,067 | 8 | 91 |
| Median age | 42.9 | 39.8 | 37.7 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 58% | 58% | 55% |
| Families w/ Kids under 18 | 39% | 40% | 43% |
| Speak English | 98% | 96% | 79% |
| Speak Spanish | 1% | 1% | 13% |

Lewistown 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 Lewistown population is 6,107 and has a population density of 1,067 people per square mile, compared to the national average of 91. The median age of all residents is 42.9, 58% of people 15 years of age or older are married and 39% have kids under the age of 18. In Lewistown, 36% of households have a median income that is below $25,000 and 7% of households report a median income above $150,000.
The Lewistown racial demographics and ethnicity breakdown could be indispensable tools for recognizing and rectifying systemic inequities, fostering social justice and inclusion and cultivating resilient communities. In Lewistown, the racial breakdown reveals 92.9% White, 1.3% Black or African American, 1.6% Asian, 1.6% American Indian and 0.1% Native Hawaiian, with 2.2% of the population identifying as Hispanic or Latino. Of all households, 97.6% reported speaking English only, while 0.5% reported speaking Spanish only. Moreover, 2.5% of residents were classified as foreign-born.
Lewistown 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. Lewistown has a population density of 1,067 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.
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 Lewistown 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. Lewistown 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: The examination and interpretation of demographics are pivotal for nurturing social cohesion and promoting understanding among diverse communities. By acknowledging and honoring differences in Lewistown demographics, societies can champion inclusivity, diversity and social cohesion while addressing social disparities and advocating for equitable opportunities. Racial demographics can potentially showcase the diversity of a population and are crucial for fostering inclusive and embracing communities. Embracing diversity fortifies social bonds, fosters cultural appreciation and enriches society by celebrating the contributions of individuals from diverse racial and ethnic backgrounds.
Healthcare Planning: By analyzing the Lewistown demographic data, it can potentially inform healthcare planning and delivery by identifying population health needs, disparities, and risk factors. Understanding demographic trends helps healthcare providers and policymakers allocate resources, develop prevention and intervention programs, and address health inequities within communities. By leveraging demographic data, healthcare providers and policymakers can work towards achieving equitable, accessible, and high-quality healthcare for all individuals and communities. This proactive approach to healthcare planning ensures that interventions are targeted, resources are allocated efficiently, and healthcare services are tailored to meet the diverse needs of populations.

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| Race | Lewistown | Montana | National |
| White | 92.86% | 89.11% | 73.35% |
| Black | 1.27% | 0.42% | 12.63% |
| Asian | 1.60% | 0.73% | 5.22% |
| American Indian | 1.55% | 6.57% | 0.82% |
| Native Hawaiian | 0.14% | 0.08% | 0.18% |
| Mixed race | 0.98% | 2.59% | 3.06% |
| Other race | 1.60% | 0.50% | 4.75% |