The median income in Brookhaven has fluctuated over the years, showing no clear correlation with demographic shifts. The area reached its highest median income of around $102,000 during 2014-2015, coinciding with a period of relative stability in racial composition. A significant drop in median income to about $83,000 occurred during 2018-2019, which aligned with a period of increasing Hispanic representation. The median income has rebounded, reaching $109,480 in 2021 before settling at $91,764 in 2022. This recovery coincides with the reversal towards a stronger white majority.

The demographic trends in Brookhaven diverge from broader national trends towards increasing diversity. While many suburban areas across the U.S. have seen growing minority populations, especially Hispanic communities, Brookhaven is experiencing a recent reversal of this trend. The area's median income remains well above the national average, suggesting it continues to be an attractive location for affluent residents. The recent strengthening of the white majority could indicate a trend of gentrification or changing housing market dynamics that are influencing who can afford to live in the area.

These demographic shifts are occurring in a relatively small population of under 5,000 residents. This means that even small changes in absolute numbers can lead to notable percentage shifts in demographic composition. While Brookhaven showed signs of becoming a more diverse community in the mid-2010s, recent trends suggest a reinforcement of its status as a predominantly white, affluent suburb. This pattern raises questions about local housing policies, economic opportunities, and community dynamics that may be influencing these demographic shifts.