Blaunt-Quarantine Island, a neighborhood in Jacksonville, Florida, exhibits characteristics of a Low Diversity community with a White Majority, as the white population constitutes 68% of residents in 2022. The area has experienced demographic shifts over the past decade, moving from a homogeneous community to one showing signs of increasing diversity. Economically, the neighborhood maintains an upper-middle-class status with a median income of $86,816 in 2022, lower than its peak in 2018 but above national averages. The island community has seen population growth in recent years.

From 2013 to 2019, Blaunt-Quarantine Island maintained a Low Diversity classification with a strong White Majority, with the white population comprising around 80% of residents. A significant shift began in 2020, marking the start of a Transitional Community phase. The percentage of white residents decreased from 83% in 2019 to 68% in 2022, while the Black population increased from 5% to 13%, and those identifying as two or more races rose from 3% to 14%. This trend suggests a rapid diversification of the community.

The neighborhood's economic trajectory shows correlations with its demographic changes. The median income rose from $83,240 in 2013 to $104,181 in 2018, coinciding with the period of highest racial homogeneity. As the community began to diversify from 2020 onwards, there was a decrease in median income, dropping to $86,816 by 2022. This trend might suggest that the influx of diverse populations has brought a wider range of economic backgrounds to the area, potentially affecting the overall median income.