From workforce strength to cost of living, the demographics of Southwestern Illinois stand out, not just on paper, but in the day-to-day interactions with the people who make up the region. With around 680,000 people, translating to roughly 260 residents per square mile, Southwestern Illinois strikes a rare balance, having enough density to be connected, yet enough space to breathe. This is a place where people put down roots, raise families, and show up ready to work.
The Southwestern Illinois demographics blend access, affordability, and talent in a way few regions can. With nearly 700,000 residents, nationally ranked institutions, and a cost of living that allows people to do more with their earnings, the numbers speak for themselves.
Our communities reflect a diverse mix of ages and experiences. The median age across the region sits in the late 30s to early 40s, with a strong showing of working-age adults and young families. Average household sizes range between 2.4 and 2.8 people, with a blend of homeowners, renters, multi-generational households, and empty-nesters.
Across the region, nearly 90% of adults hold a high school diploma, and approximately 37% have earned a bachelor’s degree or higher, on par with national averages. Thanks to a network of public schools, private institutions, community colleges, and universities, the talent pipeline here runs deep. Institutions like Southern Illinois University Edwardsville, Lewis & Clark Community College, and Kaskaskia College help power a workforce that’s as capable as it is reliable. And with a community that is both sustainable and welcoming, these educated adults choose to stay here to live and work.
Southwestern Illinois is also a region where quality of life and affordability go hand in hand. Median household incomes land near $80,000, while housing prices and everyday expenses remain far below national and metro-area averages, meaning families, entrepreneurs, and young professionals can do more with what they earn.
Culturally, the region is rooted in Midwestern values and increasingly enriched by diverse voices. Predominantly white, the area also includes growing Black, Hispanic, and Asian populations, particularly in metro-adjacent counties like Madison and St. Clair. Language diversity is growing too, with pockets of German, Spanish, and other non-English speakers shaping the fabric of local communities.
These are not just numbers; they’re new voices, traditions, and perspectives shaping local life. From growing diverse businesses to cultural festivals and multilingual services, the region’s growing diversity is woven into how Southwestern Illinois is evolving, socially, economically, and culturally.