| Statistic | St. Joseph | Missouri | National |
| Population | 77,382 | 6,326,040 | 336,919,644 |
| Population density (sq mi) | 1,758 | 92 | 91 |
| Median age | 37.6 | 38.3 | 37.7 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 50% | 57% | 55% |
| Families w/ Kids under 18 | 44% | 42% | 43% |
| Speak English | 93% | 94% | 79% |
| Speak Spanish | 4% | 3% | 13% |

The population in St. Joseph is 77,382, while the population density is 1,758 people per square mile, contrasting with the national average of 91. The median age stands at 37.6, with 50% of individuals aged 15 or older being married and 44% having children under 18. In terms of household income equality in St. Joseph, 25% of households report a median income below $25,000, while 10% report an income exceeding $150,000. The St. Joseph demographics data can provide invaluable insight into the composition, dynamics and needs of urban and rural areas, enabling planners, developers and policymakers to strategize effectively for the promotion of prosperity, equity and well-being for all residents in the area.
The St. Joseph 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 St. Joseph is 84.7% White, 5.6% Black or African American, 1.5% Asian, 0.4% American Indian and 0.7% Native Hawaiian - 7.1% of the population identify as Hispanic or Latino. Of all households, 93% reported speaking English only, while 4.5% reported speaking Spanish only. A total of 4.2% of residents were considered foreign born.
Communities such as St. Joseph, 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. St. Joseph has a population density of 1,758, surpassing the national average of 91 people per square mile, as it stands poised to reap the benefits of dense urban living.
Social Cohesion: Reporting and analyzing demographics can play a crucial role in fostering social cohesion and understanding among diverse communities. By recognizing and appreciating differences in St. Joseph demographics, societies can promote inclusivity, diversity and social harmony, while addressing social disparities and promoting equal opportunities for all individuals. Racial demographics reflect the diversity of a population and contribute to fostering inclusive and welcoming communities. Embracing diversity strengthens social cohesion, promotes cultural understanding and enriches the fabric of society by celebrating the contributions of individuals from different racial and ethnic backgrounds.
Understanding Populations: The examination and analysis of St. Joseph 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 St. Joseph population data serves as a cornerstone for addressing social, economic and environmental challenges, while also fostering the well-being and resilience of societies.
Healthcare Planning: The analysis of St. Joseph 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.
| Race | St. Joseph | Missouri | National |
| White | 84.68% | 82.53% | 73.35% |
| Black | 5.59% | 11.58% | 12.63% |
| Asian | 1.48% | 1.78% | 5.22% |
| American Indian | 0.45% | 0.42% | 0.82% |
| Native Hawaiian | 0.68% | 0.11% | 0.18% |
| Mixed race | 4.90% | 2.44% | 3.06% |
| Other race | 2.22% | 1.13% | 4.75% |