Tinley Park, Illinois, is classified as a "Low Diversity" community based on its demographic composition. As of 2022, the white population comprises 77% of the total 54,884 residents. The median income of $92,736 indicates an affluent suburban community. Over the past decade, Tinley Park has maintained its "Low Diversity" status, but subtle shifts suggest a gradual increase in diversity. The white population decreased from 81% in 2015 to 77% in 2022, while the Hispanic population grew from 9% to 12%, and the Black population increased from 4% to 6% during this period.

The median income in Tinley Park has shown an upward trend, rising from $85,997 in 2015 to $92,736 in 2022, with a peak of $104,170 in 2021. This increase correlates with the subtle demographic shifts, potentially indicating that the community is attracting a more diverse, affluent population. The population has remained relatively stable, fluctuating between 55,000 and 57,000 throughout the decade. This stability, combined with rising incomes, suggests a mature, established community that is gradually evolving rather than experiencing rapid change.

The trends in Tinley Park align with broader national patterns of increasing diversity in suburban areas. Many similar communities across the United States are experiencing gradual demographic shifts as they attract more diverse populations, often correlating with economic growth and stability.