| Statistic | St. Matthews | Kentucky | National |
| Population | 18,592 | 4,631,630 | 336,919,644 |
| Population density (sq mi) | 4,280 | 117 | 91 |
| Median age | 37.8 | 38.6 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 51% | 58% | 55% |
| Families w/ Kids under 18 | 37% | 42% | 43% |
| Speak English | 91% | 95% | 79% |
| Speak Spanish | 3% | 3% | 13% |

The population of St. Matthews is 18,592, with a population density of 4,280 people per square mile, diverging from the national average of 91. The median age is 37.8 and 51% of individuals aged 15 or older are married, while 37% have children under 18. As far as income equality in St. Matthews goes, 17% of households have a median income below $25,000, whereas 23% report an income exceeding $150,000. The St. Matthews demographics data can provide indispensable insights into the composition, dynamics and needs of cities, towns or even villages, empowering planners, developers and policymakers to devise strategies that foster prosperity, equity and well-being for all residents.
Understanding the St. Matthews racial demographics and ethnic composition is paramount for addressing systemic inequities, advancing social justice and inclusion and fortifying communities. In St. Matthews, the racial breakdown indicates 86.7% White, 7.2% Black or African American, 2.8% Asian, 0.1% American Indian and 0.1% Native Hawaiian, with 4% of the population identifying as Hispanic or Latino. Notably, 90.9% of households reported speaking English only, while 3.5% reported speaking Spanish only. Additionally, 6.9% of residents were categorized as foreign-born.
Areas with a high population density tend to support a wide range of amenities and services within walking distance or a short commute. Residents tend to have convenient access to healthcare facilities, educational institutions, cultural venues, restaurants, shops and public transportation options, enhancing their quality of life and overall well-being. The St. Matthews population density is 4,280 people per square mile, which is well-above the national average of 91 and is considered one of the most densely populated cities in the country.
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. Matthews 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.
Education Allocation: St. Matthews demographic data can help guide education planning by identifying student demographics, school enrollment trends and educational needs, helping schools and policymakers allocate resources and develop effective educational programs. It can be an essential tool for identifying disparities in educational access and outcomes among different demographic groups, such as racial and ethnic minorities, socio-economic status, or students with disabilities. By disaggregating data by demographic factors, education planners can identify areas of inequity and develop targeted interventions to improve access, support and outcomes for marginalized students. Overall, St. Matthews demographic data is invaluable in education for promoting equity, supporting student success, and fostering inclusive learning environments that meet the needs of all students.
Understanding Populations: The examination and analysis of St. Matthews 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. Matthews population data serves as a cornerstone for addressing social, economic and environmental challenges, while also fostering the well-being and resilience of societies.
| Race | St. Matthews | Kentucky | National |
| White | 86.67% | 87.48% | 73.35% |
| Black | 7.20% | 7.94% | 12.63% |
| Asian | 2.82% | 1.29% | 5.22% |
| American Indian | 0.09% | 0.21% | 0.82% |
| Native Hawaiian | 0.12% | 0.06% | 0.18% |
| Mixed race | 2.32% | 2.10% | 3.06% |
| Other race | 0.77% | 0.92% | 4.75% |