West Islip's median income has shown an upward trend, rising from $114,339 in 2013 to $126,985 in 2022, an increase of about 11%. This growth in income has occurred alongside the gradual diversification of the community, suggesting that the incoming diverse populations are likely affluent professionals or families attracted to the area's high quality of life.

The population has remained relatively stable, fluctuating between 37,000 and 39,000 residents over the decade. This stability, combined with rising incomes and increasing diversity, suggests a gradual turnover of residents rather than rapid gentrification or displacement.

West Islip's demographic shifts reflect broader trends seen in many affluent suburban communities across the United States, particularly those near major metropolitan areas like New York City. The slow but steady increase in diversity is consistent with national trends of suburbanization among minority populations, especially among middle and upper-middle-class families.

West Islip's changes are occurring at a slower rate compared to national averages. While the U.S. as a whole has been moving more rapidly towards a Majority-Minority status, West Islip remains firmly in the White Majority category, though showing signs of gradual transition.

The community's high median income, significantly above the national average, suggests that its increasing diversity is primarily driven by affluent minority families rather than a broader socioeconomic shift. This pattern of affluent diversity is common in high-income suburbs, where property values and quality of life attract diverse but economically homogeneous residents.

West Islip represents a slowly evolving suburban community, maintaining its affluent status while gradually becoming more diverse. This transition, while noticeable, is occurring at a measured pace, likely preserving much of the community's existing character while slowly incorporating new cultural influences.